Spanish for epilepsy monitoring unit nurses — the patient whose seizure medications are being reduced and who cannot understand why, the patient diagnosed with PNES who insists his seizures are real and refuses to stop his antiepileptic drugs, and the patient offered right temporal lobectomy after stereoEEG who fears losing her memory

Why these three conversations

Luisa Morales is 38 years old. She teaches third grade at a bilingual elementary school in San Antonio and has had seizures since she was 27 — eleven years of focal events that begin with a rising sensation in her stomach, followed by an interval she cannot recall, followed by exhaustion that keeps her in bed for an hour. She has been on levetiracetam since the first month, with lamotrigine added three years later when the levetiracetam alone was not enough. The medications have reduced her seizure frequency from two or three per month to roughly two per year — but not to zero. Three years ago one of those breakthrough seizures happened while she was stopped at a red light. Her car rolled forward four feet into the car ahead. The other driver was unhurt. Luisa was not at fault in any meaningful way. She lost her driving license and has not driven since. Her neurologist referred her to a comprehensive epilepsy center. The evaluation team has recommended inpatient epilepsy monitoring unit admission for pre-surgical video EEG recording. Today is day one of her admission. EMU nurse Esperanza Delgado is explaining the plan: beginning tomorrow, her levetiracetam will be reduced from 1500 mg twice daily to 1000 mg twice daily. By day four, it may be reduced further. The lamotrigine will be tapered according to a similar schedule.

Luisa: “¿Van a bajar mi medicina? Las convulsiones las controla la medicina. Si bajan la medicina, ¿no van a volver?”

Daniel García is 29. He works the overnight shift at a warehouse in Houston and has had seizure-like episodes for four years. The episodes begin without warning: he loses consciousness, his limbs shake, and he wakes up confused and exhausted fifteen to thirty minutes later. His coworkers have called 911 twice. He spent two nights in the hospital the first time, was placed on carbamazepine by a neurologist who saw him once, and has been taking 600 mg twice daily ever since. The episodes have continued at roughly the same frequency. His neurologist has been managing him remotely, and it was only at last year’s in-person appointment that she noticed the medication was not working and referred him to an epilepsy center for monitoring.

Five days ago Daniel was admitted to the EMU. Three of his habitual events were captured on video EEG over those five days. The video shows behavior that looks like his typical episodes: loss of consciousness, bilateral motor activity with asynchronous limb movements. But the EEG during all three events was completely normal — a normal background, normal alpha rhythm, no ictal discharge, no seizure. The neurology team has informed Daniel that his events are not epileptic seizures. They are psychogenic non-epileptic attacks — PNES. The attending neurologist explained the finding and the diagnosis this morning. Daniel has been in his room since then. EMU nurse Carmen Rivas comes in to check on him.

Daniel: “Eso que dijo el doctor no tiene sentido. Mis convulsiones son reales. Yo las siento. Mi cuerpo se agita solo, no lo puedo controlar. Si el EEG era normal, es porque la máquina no detectó nada — no porque no tenga epilepsia. Y además llevan años diciéndome que tengo epilepsia.”

Elena Pacheco is 52. She worked as a bank teller for twenty-two years in Phoenix until right temporal lobe epilepsy made the job impossible: she could not drive, she could not guarantee she would not seize during a transaction, and the bank had no accessible position that fit her restrictions. She retired on medical disability four years ago. She has had seizures since she was 38 — fourteen years of complex partial events that begin with a strong sense of déjà vu, followed by oral automatisms and a reaching movement with her left hand, followed by a blank interval and postictal fatigue lasting one to two hours. She has been on carbamazepine, levetiracetam, and lacosamide sequentially and in combinations. None achieved seizure freedom.

Fourteen months ago Elena was referred to the comprehensive epilepsy program. Non-invasive monitoring localized the right temporal lobe. Her MRI showed right mesial temporal sclerosis — atrophy and T2-signal change in the right hippocampus. PET scan showed right temporal hypometabolism. Neuropsychological testing confirmed relative weakness in visuospatial memory consistent with right hippocampal dysfunction. Because the data were concordant, the team recommended intracranial monitoring with stereoelectroencephalography (SEEG): stereotactically implanted depth electrodes placed inside the brain under CT guidance. Elena had fourteen electrodes implanted. Over twelve days of monitoring, eight habitual seizures were captured. All eight showed electrical onset at the right hippocampus and right amygdala before spreading. The localization result was unambiguous.

Today Elena sits in the pre-surgical consultation room with her daughter Ana. The neurosurgeon has just presented the plan: right anterior temporal lobectomy. EMU clinic nurse Valentina Ruiz stays in the room to answer questions. Elena’s first question is the question of every temporal lobe epilepsy patient facing the same conversation: “¿Cómo puedo saber que no voy a perder la memoria? El cerebro que me van a quitar es el que uso para recordar.”

Each of these conversations involves a framing gap that the EMU nurse must close. Luisa is using a framework that is correct in every other medical context: reducing a medication that is controlling a serious condition is dangerous. Daniel is using a framework that is experientially sound: his episodes are real, intense, and involuntary, and a machine that shows normal activity during something that felt like a seizure must be wrong. Elena is using a framework that is anatomically intuitive: the surgery removes part of the brain, and the brain is what stores memory, so the surgery risks memory. Each frame is internally coherent. Each frame will produce harm if left intact. Replacing each requires not just reassurance but a mechanistic explanation that the patient can hold on to across the weeks and months of evaluation, decision-making, and recovery that follow.

Scenario 1 — Luisa Morales, 38, bilingual third-grade teacher from San Antonio, eleven years of drug-resistant focal seizures, admitted to the epilepsy monitoring unit for pre-surgical video EEG, levetiracetam and lamotrigine being weaned, asking EMU nurse Esperanza Delgado why her seizure medications are being reduced

Esperanza comes into Luisa’s room on day one of the admission. Luisa is sitting up in bed with the EEG cap on — the elastic cap studded with electrodes that makes every EMU patient look like they are wearing a peculiar swimming cap — and she is looking at the wiring that connects her to the monitoring box on the bedside table. Her husband is in the chair by the window. She has the printout of tomorrow’s medication schedule in her hand.

Luisa: “La enfermera anterior me dijo que mañana me van a bajar el Keppra. Llevo once años con epilepsia. Solo tuve dos convulsiones este año. Mi neurologólogo dice que la medicina está funcionando. ¿Por qué la van a bajar?”

(The previous nurse told me they are going to reduce my Keppra tomorrow. I have had epilepsy for eleven years. I only had two seizures this year. My neurologist says the medication is working. Why are they going to reduce it?)

Esperanza sits down. She has had this conversation hundreds of times, and she knows that Luisa’s alarm is not disproportionate. From the outside — from the frame of someone who has spent eleven years managing a chronic neurological condition with medications that have kept her seizures from two or three per month to two per year — reducing those medications is the opposite of the goal.

Esperanza: “Tiene razón en preguntar, y tiene sentido que le preocupe. Quiero explicarle para qué es este monitoreo y por qué la medicina tiene que bajar para que funcione.”

(You are right to ask, and it makes sense that you are worried. I want to explain what this monitoring is for and why the medication has to be reduced for it to work.)

What the epilepsy monitoring unit records and why

Esperanza begins with the goal. The epilepsy monitoring unit exists to capture a habitual seizure — one of the patient’s typical events, the kind she has been having at home for years — under simultaneous continuous video and electroencephalography. The EEG, which records the electrical activity of the brain through the electrodes on the cap, will show which region of the brain the abnormal electrical discharge originates from and how it spreads. The video, which records Luisa’s movements and behavior at high resolution, will show what she looks like from the outside during the first seconds of the event: whether her head turns, which hand moves first, whether she makes sounds, how long the convulsive phase lasts if there is one, how long it takes her to respond to her name after the event ends. Together, the EEG onset pattern and the video semiology give the epilepsy team the equivalent of a map: the seizure onset zone, located as precisely as possible in Luisa’s brain, is the target for a potential surgical resection.

Esperanza: “El monitoreo graba dos cosas al mismo tiempo: el video — sus movimientos, su cara, su comportamiento durante la convulsión — y el electroencefalograma — la actividad eléctrica del cerebro en tiempo real. Cuando las dos se graban juntas durante una convulsión, el equipo puede ver dónde empieza la descarga eléctrica en el cerebro, cómo se mueve, y cómo se ve eso desde afuera. Ese es el mapa que necesitamos para planear una posible cirugía.”

(The monitoring records two things simultaneously: the video — your movements, your face, your behavior during the seizure — and the electroencephalogram — the electrical activity of the brain in real time. When both are recorded together during a seizure, the team can see where the electrical discharge starts in the brain, how it moves, and what that looks like from the outside. That is the map we need to plan a possible surgery.)

Luisa: “¿Y sin grabar una convulsión no pueden hacer ese mapa?”

(And without recording a seizure they cannot make that map?)

Esperanza: “No. El mapa solamente existe cuando hay una convulsión. No podemos ver dónde empieza la descarga eléctrica si el cerebro no está teniendo una. Es como intentar localizar dónde viene el ruido en una casa cuando la casa está completamente silenciosa.”

(No. The map only exists when there is a seizure. We cannot see where the electrical discharge starts if the brain is not having one. It is like trying to locate where the noise in a house comes from when the house is completely silent.)

Why the medications must be reduced during monitoring

The levetiracetam and lamotrigine that have kept Luisa’s seizure frequency to two per year are doing their job by raising her seizure threshold — the amount of neuronal excitability that must accumulate in the brain before a spontaneous seizure discharge ignites. At her current therapeutic doses, the threshold is high enough that her brain rarely discharges spontaneously. Two per year means once every six months on average. If Luisa stays on full therapeutic doses during a five-to-seven-day EMU admission, there is a reasonable chance that no habitual seizure will occur during the monitoring window. Five days is not six months.

The medication wean reduces the pharmacological suppression of the seizure threshold, lowering it back toward Luisa’s baseline — the threshold at which her brain naturally ignites. At that lower threshold, the time between seizures shortens. Most patients who are appropriately weaned in the EMU have a habitual seizure within three to five days of reaching their natural baseline. The wean is not creating new seizures. Luisa has been having seizures for eleven years. The wean is allowing a seizure that was going to happen at some point — at home, while grocery shopping, while watching her students during recess — to happen here instead, where it can be captured and mapped.

Esperanza: “Los medicamentos le suben el umbral del cerebro — la cantidad de actividad que se necesita para que empiece una convulsión. Con las medicinas en los niveles actuales, el umbral está tan alto que su cerebro pocas veces llega ahí. Por eso tiene dos al año en vez de dos al mes. Pero si mantenemos las medicinas en esa dosis toda la semana que está aquí, es probable que el cerebro nunca llegue al umbral durante el monitoreo y no grabaremos ninguna convulsión. Al bajar la medicina con cuidado, bajamos el umbral a donde estaba antes de que empezara a tomar los medicamentos. Así su cerebro tiene más probabilidad de llegar a ese umbral mientras está aquí.”

(The medications raise your brain’s threshold — the amount of activity needed for a seizure to start. With the medications at current levels, the threshold is so high that your brain rarely reaches it. That is why you have two per year instead of two per month. But if we keep the medications at that dose all week while you are here, it is likely that the brain never reaches the threshold during monitoring and we will record no seizures. By carefully lowering the medication, we lower the threshold to where it was before you started taking the medications. That way your brain has more probability of reaching that threshold while you are here.)

Luisa: “¿Y no es peligroso?”

(And is it not dangerous?)

What safety measures exist in the epilepsy monitoring unit

Esperanza does not minimize the question. It is not dangerous in the way Luisa fears — the way an unsupervised seizure at a red light was dangerous — but the honest answer requires explaining what the EMU provides that Luisa’s home environment does not.

The bed rails are padded. The EEG monitoring screen that shows Luisa’s brain activity is visible from the monitoring station at all times. An EMU technician watches that screen continuously during the admission — not just during business hours, but overnight. There is a seizure button on Luisa’s bedside table: if she feels the rising sensation in her stomach that announces her typical event, she can press it, and it flags her channel on the monitoring screen with a timestamp. Even if she cannot press the button because the aura has already progressed, the continuous video and EEG will capture the event from the start. When a seizure begins, Esperanza or the covering nurse can be in the room within thirty to sixty seconds. Lorazepam is in the medication drawer for administration if a seizure runs more than three to five minutes. Oxygen and suction are available in the room. No one at the monitoring station will step away from the screen while Luisa’s admission is active.

Esperanza: “La cámara y el EEG están grabando en todo momento, y en la cabina hay alguien mirando su pantalla ahora mismo. Las barandas de la cama están acolchadas. Tiene un botón en la mesita — si siente el aviso antes de una convulsión, présionelo. Pero aunque no lo presione, lo vamos a ver en la pantalla de inmediato. Puedo estar aquí en menos de un minuto. Y si la convulsión dura demasiado, tenemos medicamento listo en su cuarto para pararla. Usted no va a estar sola con una convulsión aquí.”

(The camera and EEG are recording at all times, and there is someone in the booth watching your screen right now. The bed rails are padded. You have a button on the bedside table — if you feel the warning before a seizure, press it. But even if you do not press it, we will see it on the screen immediately. I can be here in less than a minute. And if the seizure lasts too long, we have medication ready in your room to stop it. You will not be alone with a seizure here.)

What happens after a captured seizure

Luisa also needs to know what to expect in the recovery period, because her concern is not only about the seizure itself but about the postictal period — the hour of exhaustion and confusion that she usually experiences alone or with her husband at home. In the EMU, the postictal period will be managed by the nursing team. After the event, Esperanza will be at the bedside, timing the event and asking Luisa orientation questions at regular intervals — what is your name, what day is it, where are you right now — not to quiz her, but to document how long the postictal confusion lasts. The neurology team will review the recording the same day. They will share preliminary findings at the next scheduled visit and will call with urgent results if any arise before that.

Esperanza: “Después de la convulsión voy a estar aquí. Voy a hablarle, preguntarle cómo se llama, si sabe dónde está, para ver cómo va recuperando el conocimiento. Eso también es parte del monitoreo — el tiempo que tarda en recuperarse después es información importante para el equipo. No es un examen. Es parte de la grabación.”

(After the seizure I will be here. I will talk to you, ask you your name, whether you know where you are, to see how you recover consciousness. That is also part of the monitoring — the time it takes to recover afterward is important information for the team. It is not a test. It is part of the recording.)

Luisa: “Entonces la reducción de la medicina es para que la convulsión aparezca aquí, donde están viendo.”

(So the medication reduction is so the seizure appears here, where you are watching.)

Esperanza: “Exactamente. No es hacer que tenga una convulsión que nunca iba a tener. Es hacer que la convulsión que usted ya tiene aparezca aquí en vez de en casa sola o en el trabajo. Y cuando aparezca, la vamos a grabar completamente.”

(Exactly. It is not making you have a seizure you were never going to have. It is making the seizure you already have appear here instead of at home alone or at work. And when it appears, we are going to record it completely.)

Scenario 2 — Daniel García, 29, warehouse worker from Houston, four years of seizure-like episodes, carbamazepine for three years, three captured events with completely normal EEG, diagnosed with PNES, telling EMU nurse Carmen Rivas the machine must be wrong

Carmen comes in to find Daniel sitting on the edge of the bed, still in street clothes, looking at the EEG wires that have been disconnected now that monitoring is complete. He does not look at her when she enters. He is not angry in the way that becomes confrontational — he is the kind of quiet that comes when a person is holding a conclusion that does not fit anything else they know to be true.

Carmen: “Daniel, ¿cómo está?”

(Daniel, how are you?)

Daniel: “No muy bien. Lo que dijo el doctor esta mañana no tiene sentido. Yo siento las convulsiones. Me quedo sin conocimiento. Mi cuerpo se agita solo. Me despierto confundido, exhausto. ¿Cómo puede el EEG ser normal si eso está pasando?”

(Not very well. What the doctor said this morning does not make sense. I feel the seizures. I lose consciousness. My body shakes by itself. I wake up confused, exhausted. How can the EEG be normal if all that is happening?)

What the EEG showed during Daniel’s events and what that means

Carmen sits down. The conversation Daniel needs is not a quick clarification. It is a reframe of the entire medical framework he has been living inside for four years. She starts with the factual core of the finding.

An epileptic seizure is caused by an abnormal, synchronized electrical discharge in a population of neurons in the brain. This discharge — which can begin in a small region and spread, or begin across a large region simultaneously depending on the seizure type — produces a recognizable and consistent signature in the EEG: a pattern of high-amplitude, rhythmic electrical activity that is clearly different from normal brain background. The discharge is not subtle. It is not a minor variation in the EEG pattern that might be missed. It is an unmistakable event. Every epileptic seizure, in every patient, produces this discharge. There are no exceptions.

During three of Daniel’s habitual events captured over five days, events that looked exactly like his typical episodes on video — loss of consciousness, bilateral motor activity, prolonged recovery — the EEG showed a normal background. A normal alpha rhythm while he appeared unconscious. No discharge. No rhythmic high-amplitude activity. No ictal pattern of any kind. The EEG technician, the epilepsy fellow, and the attending neurologist all reviewed the recording. The finding was unambiguous.

Carmen: “Daniel, le voy a explicar por qué el EEG normal durante sus crisis es un hallazgo, no un error. Una convulsión epiléptica siempre — siempre — produce una descarga eléctrica que el EEG graba. No es algo pequeño que se le pueda escapar a la máquina. Es una firma clara que no tiene otro aspecto. En sus tres crisis, mientras su cuerpo se agitaba, mientras usted estaba inconsciente, el EEG mostraba actividad cerebral normal. La máquina detectó lo que estaba pasando en el cerebro, y lo que estaba pasando era normal. Eso es el hallazgo.”

(Daniel, I am going to explain why the normal EEG during your events is a finding, not an error. An epileptic seizure always — always — produces an electrical discharge that the EEG records. It is not something small that the machine can miss. It is a clear signature that looks like nothing else. During your three events, while your body was shaking, while you were unconscious, the EEG was showing normal brain activity. The machine detected what was happening in the brain, and what was happening was normal. That is the finding.)

Daniel: “Entonces me están diciendo que me lo estoy imaginando.”

(So you are telling me I am imagining it.)

What PNES is and what it is not

Carmen expected this response. It is the most common response to the PNES diagnosis, and it reflects a correct intuition applied incorrectly. The events are real. The loss of consciousness is real. The motor activity is real. The postictal exhaustion is real. Psychogenic non-epileptic attacks are not fabricated and are not voluntary. They are not a sign of weakness, poor character, or exaggerated distress. They are a condition in which the brain generates episodes that are experientially indistinguishable from seizures through a mechanism that does not involve the synchronized epileptic electrical discharge — and therefore produces no EEG signature.

The mechanism is not fully understood, but the current understanding is that PNES involves dysregulation of the systems that control consciousness, motor activity, and the processing of psychological distress. In many patients, PNES is associated with a history of trauma, high psychological stress, or specific psychological triggers that the patient has not consciously connected to the episodes. Some patients develop PNES after a genuine neurological event — a true seizure, a stroke, a period of severe illness — and the brain learns the episode pattern during that initial genuine event before beginning to generate it independently through non-epileptic pathways. The episodes feel the same from the inside because the subjective experience of altered consciousness, involuntary movement, and postictal confusion can be produced by multiple brain states, not only by epileptic discharge.

Carmen: “No está imaginando nada. Lo que siente en una crisis — la pérdida de conocimiento, el temblor, la confusión después — es real. No finge. Lo que pasó en el EEG nos dice que el cerebro está produciendo esas crisis sin la descarga eléctrica anormal de la epilepsia. El cerebro tiene otros caminos para producir esos mismos síntomas — pérdida de conocimiento, movimiento involuntario — sin que sea epilepsia. Ese es el camino que su cerebro está usando.”

(You are not imagining anything. What you feel during an episode — the loss of consciousness, the shaking, the confusion afterward — is real. You are not faking. What happened in the EEG tells us that the brain is producing those episodes without the abnormal electrical discharge of epilepsy. The brain has other pathways for producing those same symptoms — loss of consciousness, involuntary movement — without it being epilepsy. That is the pathway your brain is using.)

Daniel: “¿Y la carbamazepina? Llevo tres años tomándola.”

(And the carbamazepine? I have been taking it for three years.)

Why carbamazepine must be discontinued

Carbamazepine is a sodium channel blocker. It works by stabilizing the membrane of neurons, making it harder for the synchronized, high-frequency electrical discharge of an epileptic seizure to propagate through brain tissue. For epileptic seizures, this mechanism is effective in many patients. For PNES, it has no mechanism of action at all: PNES is not caused by sodium channel instability or by epileptic neuronal discharge. Carbamazepine does not treat, reduce, or prevent PNES.

What carbamazepine does cause is a real and accumulating side-effect burden. Hyponatremia — low blood sodium — is common with long-term carbamazepine use; Daniel has already had mild hyponatremia on two prior blood draws, which the prescribing neurologist noted but attributed to inadequate fluid intake. Bone marrow suppression is a known risk. Liver enzyme elevation occurs in a subset of patients. In a small number of patients, carbamazepine causes severe allergic skin reactions including Stevens-Johnson syndrome, a potentially life-threatening condition. In patients of East Asian ancestry, a genetic variant called HLA-B*15:01 dramatically increases this risk; Daniel’s ancestry is unknown but the variant is also present at low frequency in other populations. Finally, for a 29-year-old man who may eventually have children, carbamazepine is a teratogen and an inducer of CYP3A4 that can reduce the effectiveness of hormonal contraception in a partner.

Continuing a medication that provides no benefit while exposing Daniel to these risks for what may become many more years is pharmacologically unjustifiable. Carmen is direct about this.

Carmen: “La carbamazepina bloquea las descargas eléctricas que ocurren en la epilepsia. Como sus crisis no son de ese tipo, la carbamazepina no las está tratando — y nunca las ha tratado. Las crisis que usted ha tenido estos tres años no mejoraron con la carbamazepina porque la carbamazepina no es la respuesta a lo que usted tiene. Y mientras tanto, la carbamazepina tiene efectos secundarios reales: el sodio bajo que ha tenido, el hígado, los huesos. Seguir tomándola sin que le ayude no es la decisión correcta.”

(Carbamazepine blocks the electrical discharges that occur in epilepsy. Since your episodes are not that type, carbamazepine is not treating them — and has never treated them. The episodes you have had over these three years did not improve with carbamazepine because carbamazepine is not the answer to what you have. And meanwhile, carbamazepine has real side effects: the low sodium you have had, the liver, the bones. Continuing to take it without it helping is not the right decision.)

What does help and what happens next

Carmen also tells Daniel what the evidence shows about effective treatment for PNES. Psychotherapy — specifically cognitive behavioral therapy adapted for non-epileptic attacks, and in some patients trauma-focused therapy — is the most evidence-supported intervention. It does not work immediately, and it requires engaging with a framework that Daniel may not yet accept. Physical therapy can reduce the functional disability that accumulates during the postictal recovery periods. Some patients with PNES find that identifying specific psychological triggers — stressful events, specific physical sensations, interpersonal conflicts — and developing strategies to address those triggers reduces episode frequency.

Carmen does not expect Daniel to leave today having accepted the diagnosis. She knows from experience that the PNES diagnosis often takes weeks or months to integrate — partly because it requires dismantling an identity that has been built around the epilepsy diagnosis, partly because it requires engaging with the possibility that psychological factors are involved, which carries stigma that the word “epilepsy” does not. She plants the framework and makes clear that the team is not dismissing his distress or his symptoms.

Carmen: “El equipo va a hablar con usted sobre el camino hacia adelante. Hay tratamiento para lo que usted tiene — no es la carbamazepina, pero sí hay tratamiento. Lo que le pido es que no tome una decisión sobre nada antes de tener esa conversación. Lo que siente es real. El diagnóstico no niega eso — lo que hace es abrir el camino a un tratamiento que sí puede ayudar.”

(The team will talk with you about the path forward. There is treatment for what you have — it is not carbamazepine, but there is treatment. What I ask is that you do not make a decision about anything before having that conversation. What you feel is real. The diagnosis does not deny that — what it does is open the path to a treatment that can actually help.)

Scenario 3 — Elena Pacheco, 52, retired bank teller from Phoenix, fourteen years of drug-resistant right temporal lobe epilepsy, twelve days of stereoEEG confirming right hippocampal seizure onset, offered right anterior temporal lobectomy, asking EMU clinic nurse Valentina Ruiz how the surgeon can guarantee she will not lose her memory

Valentina has been part of the comprehensive epilepsy program for seven years. She has sat through many pre-surgical consultations and stayed after each one to field the questions that patients and families were too dazed to ask while the neurosurgeon was in the room. Elena’s daughter Ana sits in the chair beside her. Elena herself is leaning forward slightly, looking at the diagram on the consultation table that shows the location of the planned resection: the right hippocampus, the right amygdala, a small portion of the right anterior temporal neocortex.

Elena: “El doctor dijo que van a sacar parte de la memoria. ¿Cómo puede saber cuánta memoria me va a quedar?”

(The doctor said they are going to remove part of the memory. How can he know how much memory I will have left?)

What stereoEEG established and why it matters

Valentina starts with what the data produced. Stereoelectroencephalography — SEEG — is an intracranial monitoring technique in which depth electrodes are placed stereotactically inside the brain using CT guidance. Each electrode is a thin, flexible probe with multiple recording contacts along its length, positioned to sample specific brain regions at millimeter-level spatial resolution. Unlike scalp EEG, which averages electrical activity across large cortical territories through the signal-distorting medium of skull and scalp, SEEG records directly from the tissue being monitored. It can distinguish seizure activity in the hippocampus from seizure activity in the adjacent parahippocampal gyrus two centimeters away. It can identify whether the amygdala is part of the seizure onset zone or whether it is recruited only after the hippocampus fires first.

Elena had fourteen electrodes implanted targeting the right mesial temporal structures — the hippocampus, amygdala, entorhinal cortex, parahippocampal gyrus — and the lateral temporal neocortex, including the inferior temporal gyrus. Over twelve days of continuous recording, eight of Elena’s habitual events were captured. Every event showed the same pattern: the initial discharge began at the right hippocampus and right amygdala, within the first two seconds of any clinical or video-EEG change, before any other electrode showed activity. The discharge then spread — in some events into the lateral temporal cortex, in some into the contralateral hemisphere — but the onset was consistent, reproducible, and unambiguous across eight events over twelve days.

Valentina: “Los electrodos que pusieron dentro del cerebro grabaron ocho convulsiones, y las ocho empezaron en el mismo lugar: el hipocampo derecho y la amígdala derecha. No una vez — ocho veces, en doce días. Eso es el mapa más claro que podemos obtener. La cirugía sacaría ese tejido porque es el tejido que está causando las convulsiones.”

(The electrodes placed inside the brain recorded eight seizures, and all eight started in the same place: the right hippocampus and the right amygdala. Not once — eight times, in twelve days. That is the clearest map we can obtain. The surgery would remove that tissue because it is the tissue that is causing the seizures.)

What the MRI showed and what it means for memory risk

Elena’s question about memory is the right question, and it deserves a precise answer rather than reassurance. The answer depends on what Elena’s right hippocampus is currently doing, and the MRI and neuropsychological data speak to that directly.

The MRI showed right mesial temporal sclerosis: the right hippocampus is atrophic — smaller than normal, with gliotic changes visible on T2-weighted sequences. Mesial temporal sclerosis is not simply a scar from old seizures. It is a structural abnormality in which normal hippocampal neurons have been progressively replaced by non-functional gliotic tissue, beginning often in childhood or early adulthood in some patients, accelerated by repeated seizure activity over years. Elena’s right hippocampus has been structurally abnormal for a long time. It is not a functioning memory structure operating normally between seizures. It is a damaged structure that is dysfunctional and is producing seizures.

Neuropsychological testing confirmed this pattern in functional terms. Elena’s verbal memory — the ability to learn and recall lists, paragraphs, stories — is intact and left-lateralized. Her visuospatial memory — the ability to learn and recall geometric patterns, spatial layouts, faces — is mildly to moderately impaired compared to age-matched norms. This is exactly the pattern of right hippocampal dysfunction. The right hippocampus, in most right-handed patients, is primarily responsible for visuospatial and contextual memory. Elena’s visuospatial memory is already impaired because the right hippocampus causing her seizures is already not functioning normally.

Valentina: “El hipocampo derecho en su MRI ya está dañado. No es tejido sano que funciona bien entre las convulsiones — es tejido que lleva años con cicatrices y que ya no funciona bien. Las pruebas de memoria que hizo lo confirman: la memoria que depende del lado derecho — recordar figuras, espacios, caras — ya está afectada. La cirugía no va a quitar tejido sano que ahora está funcionando bien. Va a quitar tejido que ya está dañado y que está causando las convulsiones.”

(The right hippocampus on your MRI is already damaged. It is not healthy tissue that functions normally between seizures — it is tissue that has been scarred for years and that is no longer functioning well. The memory tests you did confirm this: the memory that depends on the right side — remembering figures, spaces, faces — is already affected. The surgery is not going to remove healthy tissue that is currently functioning normally. It is going to remove tissue that is already damaged and that is causing the seizures.)

Drug-resistant epilepsy and what the comparative risks are

Elena needs to understand the risk comparison: not the absolute risk of the surgery, but the surgery’s risk relative to the alternative of continuing to live with drug-resistant epilepsy. The ILAE definition of drug-resistant epilepsy requires failure of two appropriately chosen and dosed antiepileptic drugs. Elena has failed three. After two failures, the probability of achieving seizure freedom with a fourth drug is approximately 5%. Adding a fourth, fifth, or sixth medication offers a 5% chance of benefit while adding cumulative drug side effects and leaving the seizure burden unchanged for 95% of patients.

The ongoing seizure burden carries its own risks that are often undercommunicated to patients who think of their condition as “managed.” Sudden unexpected death in epilepsy — SUDEP — occurs when a seizure, typically a nocturnal tonic-clonic event, triggers a cascade of autonomic dysregulation that leads to cardiac arrest or central apnea before the patient can be resuscitated. The annual SUDEP risk for a patient with drug-resistant temporal lobe epilepsy is approximately 1 in 300 to 1 in 500 per year. Over ten more years at that risk, Elena’s cumulative probability of SUDEP is 2 to 3 percent — not negligible. Additionally, each seizure event produces hippocampal stress that contributes to the progressive atrophy documented on serial MRIs in long-term epilepsy patients. The memory deterioration that Elena fears from surgery is already occurring, more slowly but continuously, from the seizures themselves.

Right anterior temporal lobectomy for mesial temporal lobe epilepsy in a patient with concordant MRI showing mesial temporal sclerosis and concordant intracranial EEG localization achieves seizure freedom in approximately 65 to 70% of patients at two years, with sustained seizure freedom in a majority of those at five years. This is the best-supported surgical outcome in epilepsy surgery.

Valentina: “Después de tres medicamentos que no funcionaron, la probabilidad de que un cuarto medicamento elimine las convulsiones es de alrededor del cinco por ciento. Y mientras tanto, las convulsiones no son inofensivas — hay un riesgo de muerte súbita relacionada con la epilepsia, y cada convulsión contribuye a daño acumulado en el cerebro. La cirugía, en pacientes con el mismo tipo de epilepsia y los mismos resultados que usted tiene, logra que dos de cada tres queden sin convulsiones. La pregunta no es solo qué riesgo tiene la cirugía. La pregunta es qué riesgo tiene no operarse.”

(After three medications that did not work, the probability that a fourth medication will eliminate the seizures is about five percent. And meanwhile, the seizures are not harmless — there is a risk of sudden death related to epilepsy, and each seizure contributes to cumulative brain damage. The surgery, in patients with the same type of epilepsy and the same findings you have, achieves seizure freedom in two out of three patients. The question is not only what risk the surgery carries. The question is what risk not operating carries.)

What Elena takes from this conversation

Ana: “¿Y si la cirugía no funciona? ¿Y si queda peor?”

(And if the surgery does not work? And if she is worse afterward?)

Valentina: “El treinta por ciento de los pacientes con la misma condición que su mamá no quedan completamente sin convulsiones después de la cirugía — algunos tienen mejora significativa pero no cero convulsiones, y algunos no mejoran. Eso es real y su mamá tiene que saberlo. Lo que los datos nos dicen es que muy pocos empeoran después de esta cirugía específica — el tejido que se saca ya está dañado, y quitar tejido dañado que causa convulsiones raramente produce pérdida de funciones que la persona tenía antes. Pero si quedan preguntas, hay otra cita con el equipo antes de cualquier decisión. Nadie espera que decidan hoy.”

(Thirty percent of patients with the same condition as your mother are not completely seizure-free after surgery — some have significant improvement but not zero seizures, and some do not improve. That is real and your mother needs to know it. What the data tells us is that very few are worse after this specific surgery — the tissue that is removed is already damaged, and removing damaged tissue that causes seizures rarely produces loss of functions the person had before. But if there are remaining questions, there is another appointment with the team before any decision. No one expects you to decide today.)

Elena looks at the diagram again. “El hipocampo derecho ya no me funciona bien.”

(The right hippocampus is already not functioning well for me.)

Valentina: “Las pruebas lo confirman. Lo que la cirugía sacaría ya está dañado. La pregunta real es si las convulsiones que siguen sin controlarse van a dañar más con el tiempo.”

(The tests confirm it. What the surgery would remove is already damaged. The real question is whether the seizures that remain uncontrolled will damage more over time.)

Eight practical phrases for epilepsy monitoring unit nurses

The three scenarios above illustrate the communication failures that produce the worst outcomes in EMU nursing with Spanish-speaking patients: the patient who refuses the medication wean because she believes reducing her medications is the same as stopping her seizure protection; the patient who rejects the PNES diagnosis because his events are real and he cannot understand how a normal EEG could be the finding rather than a failure; and the patient who cannot consent to temporal lobectomy because she believes the surgery will remove her memory rather than the already-damaged tissue that is causing her seizures. The phrases below are the clinical Spanish framework that prevents each failure.

1. Medication wean rationale: “Para grabar la convulsión que necesitamos ver, tenemos que bajar los medicamentos que evitan que aparezca. No estamos creando convulsiones nuevas — estamos haciendo que la convulsión que usted ya tiene aparezca aquí, donde la podemos grabar.” (To record the seizure we need to see, we have to lower the medications that prevent it from appearing. We are not creating new seizures — we are making the seizure you already have appear here, where we can record it.)
2. Seizure threshold concept: “Las medicinas suben el umbral del cerebro — la cantidad de actividad que se necesita para que empiece una convulsión. Si el umbral está muy alto, la convulsión no va a aparecer aquí. Al bajarlo con cuidado, hacemos más probable que aparezca durante el monitoreo.” (Medications raise the brain’s threshold — the amount of activity needed for a seizure to start. If the threshold is too high, the seizure will not appear here. By carefully lowering it, we make it more likely to appear during monitoring.)
3. EMU safety monitoring: “Tenemos la cámara y el EEG grabando en todo momento y alguien mirando su pantalla ahora mismo. Si empieza una crisis, llegaré en menos de un minuto. Tiene el botón de convulsión — si siente el aviso, présionelo. Aunque no lo presione, lo vamos a ver en la pantalla.” (We have the camera and EEG recording at all times and someone watching your screen right now. If a seizure starts, I will be here in less than a minute. You have the seizure button — if you feel the warning, press it. Even if you do not press it, we will see it on the screen.)
4. PNES validation: “Lo que siente en una crisis — la pérdida de conocimiento, el temblor, la confusión después — es real. No está fingiendo. Lo que el EEG nos dice es que el cerebro produce esas crisis sin la descarga eléctrica anormal de la epilepsia. Las crisis son reales. El camino que las produce es diferente.” (What you feel during an episode — the loss of consciousness, the shaking, the confusion afterward — is real. You are not faking. What the EEG tells us is that the brain produces those episodes without the abnormal electrical discharge of epilepsy. The episodes are real. The pathway that produces them is different.)
5. Why carbamazepine is stopped in PNES: “La carbamazepina bloquea las descargas eléctricas de la epilepsia. Como sus crisis no son de ese tipo, no las está tratando — y tiene efectos secundarios reales. Bajarla es para protegerlo, no para dejar su cerebro sin protección.” (Carbamazepine blocks the electrical discharges of epilepsy. Since your episodes are not that type, it is not treating them — and it has real side effects. Lowering it is to protect you, not to leave your brain without protection.)
6. Drug-resistant epilepsy definition: “Cuando dos medicamentos del tipo correcto no controlan las convulsiones, los estudios muestran que un tercero casi nunca funciona. No es que no encontramos el medicamento correcto todavía — es que la epilepsia de usted no responde a medicamentos. Eso es lo que abre la puerta a otros tratamientos.” (When two medications of the right type do not control seizures, studies show that a third almost never works. It is not that we have not found the right medication yet — it is that your epilepsy does not respond to medications. That is what opens the door to other treatments.)
7. StereoEEG localization finding: “Pusimos electrodos dentro del cerebro y grabamos ocho convulsiones. Las ocho empezaron en el mismo lugar: el hipocampo derecho. Ocho veces, en doce días, el mismo lugar. Ese es el mapa que necesitábamos para planear la cirugía.” (We placed electrodes inside the brain and recorded eight seizures. All eight started in the same place: the right hippocampus. Eight times, in twelve days, the same place. That is the map we needed to plan the surgery.)
8. Memory risk reframe: “El hipocampo derecho en el MRI ya está dañado y las pruebas de memoria muestran que ya no está funcionando bien. La cirugía no saca tejido sano — saca tejido que ya está dañado y que está causando las convulsiones. La pregunta real es si las convulsiones que siguen sin controlarse van a dañar más la memoria con el tiempo.” (The right hippocampus on the MRI is already damaged and the memory tests show it is no longer functioning well. The surgery does not remove healthy tissue — it removes tissue that is already damaged and that is causing the seizures. The real question is whether the seizures that remain uncontrolled will damage memory more over time.)

What makes epilepsy monitoring unit communication uniquely difficult

The three scenarios in this post share a structural feature that makes EMU nursing communication among the most cognitively demanding in all of neurology: the patient’s reasonable intuitions — about seizure protection, about the reliability of their own bodily experience, about what surgery removes — are systematically wrong in the specific clinical contexts of video EEG monitoring, PNES diagnosis, and epilepsy surgery evaluation. And each wrong intuition is not merely a misunderstanding to be corrected with information. Each is an intuition that has been reinforced by years of lived experience and medical management that did not question it.

Luisa’s framework is built on eleven years of taking medications that have reduced her seizures from two or three per month to two per year. That framework is correct: the medications work. Asking her to reduce them requires her to simultaneously hold the belief that the medications work and the belief that reducing them temporarily is the right clinical decision. The only bridge across that contradiction is a mechanistic explanation of what the EMU monitoring is designed to capture and why capturing it requires the seizure threshold to be lowered. The phrase “we are not creating new seizures, we are making the seizure you already have appear here” is not a euphemism. It is the mechanistic truth, and it is the only framing that makes the medication wean coherent from Luisa’s perspective.

Daniel’s framework is built on four years of having been told by a physician that he has epilepsy, organized his life around that diagnosis, and taken a daily medication that has not helped but has been pharmacologically plausible because he understood himself to be treating epilepsy. The PNES diagnosis does not simply add new information. It requires Daniel to revise the entire medical identity he has been building for four years, accept that a physician was wrong about his diagnosis, and engage with a new framework that involves psychological factors he may not consciously connect to his episodes. The EMU nurse’s job is not to overcome this resistance in a single conversation. It is to ensure that the factual core of the finding — the EEG was normal during a habitual event — is communicated clearly enough that Daniel cannot attribute the diagnosis to a physician preference or a cultural misunderstanding, and that the validation — the episodes are real, you are not faking — is given with enough specificity that Daniel can hear it as a clinical statement rather than a platitude.

Elena’s framework is built on the anatomically intuitive understanding that memory lives in the hippocampus and the hippocampus is what the surgery would remove. This is correct at a general level. But it misses two critical specifics: that her right hippocampus is already damaged and already not contributing normal memory function (the neuropsychological tests demonstrate this), and that the comparison is not between surgery and a normally functioning hippocampus but between surgery and continued drug-resistant epilepsy with its own cumulative damage. Reframing the question — not whether surgery damages memory but whether continued seizures damage it more — requires giving Elena both the neuropsychological findings that quantify her current right hippocampal dysfunction and the outcomes data that give the comparison its clinical weight.

All three require Spanish fluency that goes beyond vocabulary. They require the ability to identify the specific intuition the patient is applying, explain precisely why that intuition does not map onto this specific clinical context, and construct a replacement understanding that is mechanistically accurate, emotionally honest about uncertainty, and stable enough to hold up across the weeks of decision-making and monitoring that follow.

For more clinical Spanish in neurology, see Spanish for neurology nurses and Spanish for neurology clinic nurses. For related ICU nursing conversations, see Spanish for inpatient stroke nurses and Spanish for neurosurgery nurses. For spinal cord injury communication, see Spanish for spinal cord injury nurses. Practice these phrases with AI patients at ClinicaLingo practice, or download the 50 Spanish ED phrases PDF for quick-reference use on your shift.

The complete library of clinical-Spanish scenario posts is at the ClinicaLingo blog.