What Is Epilepsy? — Windows Lit One by One, Lights That Flash All at Once

The First Seizure Seen

At the dinner table, a 23-year-old son suddenly stops mid-sentence while talking. His eyes turn to one side, his body stiffens, and he slips out of his chair and falls to the floor. The one to two minutes of rhythmic shaking in his arms and legs pass as slowly as an hour. After the shaking stops, the son stares blankly for a long time, then asks what happened.

Two questions remain for the family who were there: what it was they just saw, and whether this is epilepsy. It is a disease that used to be called convulsions in the past.

This article starts from that evening and answers the two questions in turn.

Seizure and Epilepsy Are Different Things

The brain is made up of countless nerve cells. Nerve cells are the basic cells of the brain and nerves that receive electrical signals and pass them on to the next cell. Normally, nerve cells send and stop signals individually depending on the job assigned to each.

A seizure is a symptom that suddenly appears and disappears as the nerve cells in the brain abnormally, excessively, or all at once fire signals in sync. A seizure is the name of an event. It is something that comes on suddenly and passes shortly after (PMID 35380580).

About 1 in 10 people experience a seizure at least once in their lifetime (PMID 30948624). Not every one of those single instances leads to epilepsy. A provoked seizure is one directly caused by an urgent circumstance at the time, such as a major disruption in blood sugar or body salt levels, or drug intoxication. A first seizure may be caused by such a metabolic abnormality or drug intoxication, or it may be linked to a preexisting cause such as structural damage to the brain (PMID 30948624). In children, febrile seizures that occur with fever are distinguished from other seizures (PMID 30199358). The seizures counted when defining epilepsy are unprovoked seizures that occur without such acute brain injury at the time (PMID 31852003).

Epilepsy is a brain disease in which a tendency to repeatedly cause seizures continues for a long time. The International League Against Epilepsy (ILAE) has established three criteria to identify this tendency in actual clinical practice. They are when there are two or more unprovoked seizures occurring more than 24 hours apart, when there is a single unprovoked seizure but the chance of future seizures over the next 10 years is as high as that of someone who has had two (at least 60%), and when a specific epilepsy syndrome is diagnosed (PMID 24730690).

Epilepsy is a common disease. Approximately 65 million people worldwide (PMID 35380580), and over 70 million people according to estimates from another review, live with epilepsy (PMID 30686584). Epilepsy does not always last for life either. A person is considered to have "resolved" epilepsy if they have passed the age of an age-dependent epilepsy syndrome, or if they have been seizure-free for 10 years and off seizure medicines for the last 5 years. The ILAE adds that this resolution does not necessarily mean a complete cure (PMID 24730690).

The difference between the two becomes clear if you picture a high-rise building lit up at night. Normally, because the rooms are doing different tasks, the lights in the windows turn on and off individually. A seizure is the moment when many windows suddenly start flashing all at once in the same rhythm. Epilepsy is a building where such flashing tends to repeat easily, and a provoked seizure is a single flash caused by external circumstances.

The analogy holds only this far. Nerve cells are not light bulbs, and signals do not flow like current through wires. This flashing depicts events inside the brain, not lights from the outside, and as we will see later, seizures do not always arrive in a noisy fashion.

A single seizure is an event, and epilepsy is a brain disease characterized by a tendency for seizures to recur.

Things That Look Like Seizures

Collapsing and shaking does not always mean a seizure.

Fainting is when the brain temporarily lacks blood flow, causing a person to lose consciousness, fall, and wake up shortly after. Fainting is one of the things most frequently confused with epileptic seizures. Events that look like seizures but are not epileptic seizures (psychogenic nonepileptic seizures) also fall into this category (PMID 33399092).

The first tool to tell the two apart is not a testing machine. Careful stories heard from the patient and the person who saw the scene are the first step of diagnosis, and those stories determine what further tests to run (PMID 33399092). Seizures rarely happen in the clinic, making a witness's testimony and home videos important tools. However, studies show that the stories of patients and witnesses are inaccurate quite often (PMID 33399092).

Getting the distinction wrong harms both sides. Treating something that is not epilepsy as epilepsy delays correct diagnosis and treatment and leads to taking unnecessary medicine. Conversely, missing epilepsy lets seizures return, leaving risks of injury, long-term seizures that follow later, and sudden death (PMID 33399092).

Not all collapses and shakes are seizures, and the first tool to tell them apart is the witness's story.

The Many Shapes of Seizures

Seizures fall broadly into four branches. In the 2025 revised ILAE classification, those four are focal seizures, generalized seizures, unknown onset seizures, and unclassifiable seizures (PMID 40264351).

Focal seizures are seizures that start in one part of one side of the brain. Focal seizures are further divided by whether awareness remained or was impaired during the seizure (PMID 40264351). Awareness is gauged by whether the person remembers events during the seizure afterward and whether they respond when called (PMID 41081650). Some seizures leave awareness intact while only one hand shakes.

Generalized seizures are seizures that spread across both sides of the brain together from the start. Generalized seizures are grouped into absence seizures, tonic-clonic seizures, and other generalized seizures (PMID 40264351). Absence seizures are generalized seizures where the person goes blank for a few seconds and then returns as if nothing happened. This is the main generalized seizure where prominent movements are absent (PMID 30921011).

Tonic-clonic seizures are seizures where the whole body stiffens and then follows with rhythmic shaking. This is the seizure many people picture, but this shape can arrive as a generalized seizure from the beginning, or it can arrive at the end of a focal seizure that started in one place and spread to both sides of the brain (PMID 28276060). Because treatment and evaluation differ depending on where the seizure started, what was visible in the first few seconds serves as an important clue (PMID 30921011).

To put it in terms of a building, a focal seizure is when flickering starts in the windows of one section, and that flicker may spread to the entire building. A generalized seizure is when both wings flicker together from the start. Focal seizures are more common than generalized seizures in both children and adults (PMID 31852003).

Seizures come in a variety of forms, far beyond just collapsing and shaking—ranging from going blank for a few seconds to the shaking of a single hand.

Why It Happens

There are several causes that bring about epilepsy. The ILAE classification divides causes into structural, genetic, infectious, metabolic, and immune causes, and unknown causes, and considers that knowing the cause frequently helps in determining prognosis and treatment (PMID 28276062, PMID 30921012).

Epilepsy starts most often during infancy and after older age (PMID 30686584). The fact that it is frequent in older people is interpreted as being because strokes, diseases in which nerve cells gradually break down, and tumors are common at this age (PMID 31852003). A stroke is a disease in which blood going to the brain is suddenly blocked or bursts, damaging the brain that received that blood. The spot left behind by a stroke can become the spot where subsequent seizures begin.

That does not mean a cause is always visible. Even in high-income countries, about half of epilepsy cases have no identified cause (PMID 31852003). How much a cause is identified varies depending on the circumstances of that society and how broadly tests were performed (PMID 31852003).

Excessive alcohol consumption and lack of sleep are cited as seizure triggers that people with epilepsy should avoid (PMID 35893283).

The causes of epilepsy are many, including brain damage, genetics, infections, and immunity, but a considerable number of cases have no identified cause.

After the First Seizure

A person who has experienced their first seizure undergoes medical evaluation. A first seizure is a common but serious event that requires a thorough evaluation (PMID 30948624). The evaluation begins with a detailed history and an early specialist evaluation (PMID 30948624).

Testing comes next. An EEG is a wave of electrical signals produced together by countless nerve cells in the brain, captured by electrodes attached to the surface of the head. An MRI is a test that images the inside of the body using magnets and radio waves, showing not only bones but also soft tissues like discs and nerves. In studies compiled by a 2007 guideline from the American Academy of Neurology (AAN), about 23% of adults who experienced a first unprovoked seizure showed abnormalities suggesting epilepsy on their EEG, and these abnormalities predicted the recurrence of seizures. Put the other way around, the majority of the rest did not show such abnormalities on their first EEG. Brain imaging such as CT (computed tomography) or MRI showed clear abnormalities that could be the cause of the seizure in about 10% of cases (PMID 18025394).

Therefore, this guideline recommends considering the inclusion of an EEG and brain imaging in the evaluation of adults who have experienced a first unprovoked seizure. Blood tests showed abnormalities in up to 15% of cases, but they were minor and not the cause of the seizure, so they are determined based on the person's history and examination (PMID 18025394).

Whether a seizure will recur after a first seizure varies greatly from person to person. In children, the recurrence rate after a first unprovoked seizure ranges from 23% to 96% over a median follow-up of 2 years depending on the study, and the most important predictive clues are the cause of the seizure and EEG abnormalities (PMID 30199358).

When to start medication is determined individually for each person. A clinical review notes that medication should be strongly considered if there have been two unprovoked seizures, if even one occurred during sleep, or if abnormalities are present on the EEG or MRI (PMID 35380580).

The evaluation after a first seizure begins with the patient's story, proceeds to an EEG and brain imaging, and uses those results to gauge the risk of recurrence.

Controlling Seizures with Medication

Antiseizure medications are a family of drugs that prevent seizures from happening. They are the backbone of epilepsy treatment, and there are around 30 available today (PMID 34145528). Because their mechanisms of action differ, most drugs cannot suppress all seizures, making it important to select the right one for the specific type of seizure (PMID 34145528).

Roughly 60 to 70 percent of all patients live without seizures thanks to antiseizure medications (PMID 35380580). However, these drugs suppress seizures and do not yet change the underlying disease process of epilepsy itself (PMID 30686584). That does not make the medications any less important. Inadequately treated epilepsy is linked to increased rates of injury and death (PMID 35380580). Because some drugs have properties that speed up the breakdown of other medications, they can act to raise cholesterol or weaken bones, which is why drugs are chosen by carefully considering age, sex, coexisting conditions, and other medications (PMID 35380580).

Drug-resistant epilepsy is epilepsy where seizures remain uncontrolled even after properly trying two appropriate antiseizure medications. About one-third of epilepsy patients fall into this category (PMID 39532109, PMID 37352888). This proportion varies greatly depending on the population sampled. In an analysis pooling 103 observational studies, the rate of drug resistance was 13.7 percent in community-based populations and 36.3 percent in hospital-based clinical populations. There was substantial heterogeneity across the studies and a high risk of bias (PMID 33722992).

As patients switch medications one by one, the likelihood that a new drug will stop seizures decreases (PMID 37352888). Therefore, if two drugs fail, it is recommended to get a re-evaluation at an epilepsy specialty center as soon as possible, and there is substantial evidence that delays in finding effective treatment can lead to worse outcomes (PMID 37352888). Drug resistance does not mean that a person will not respond to any medication at all (PMID 37352888).

The decision to reduce or stop medication is made by the prescribing physician together with the patient. Patients who do not take antiseizure medications are at a higher risk of sudden death, which we will look at later, and taking medications without missing doses is cited as a modifiable factor that can alter that risk (PMID 35893283, PMID 35102124).

While about 60 to 70 percent live without seizures using antiseizure medications, about one in three people receiving hospital care (13.7 percent of the general community population) cannot be controlled with two appropriate drugs.

The Road Beyond Medication

Epilepsy surgery is a procedure to find, remove, or destroy the area of the brain where seizures begin. For drug-resistant epilepsy, the standard treatment to stop seizures is a resective surgery that removes the area where seizures start (PMID 39532109). The primary candidates are people with focal epilepsy whose seizures do not respond to medication (PMID 31420415).

Before surgery, an evaluation is performed to locate that area. This involves capturing an actual seizure using prolonged electroencephalography (EEG) recordings combined with MRI and imaging, alongside tests of cognitive functions like memory and speech, as well as mental state. The goal of this evaluation is both to find where seizures originate and to prevent neurological and cognitive functions from being impaired after surgery (PMID 31420415). The aim is to gather evidence from multiple avenues showing that seizures start from a single site while the rest of the brain is doing its job (PMID 17491501). The temporal lobe is the side part of the cerebrum located inside the temple above the ear, and it is involved in hearing sounds and understanding speech. The hippocampus is a small structure deep inside the temporal lobe that is essential for turning fresh experiences into long-lasting memories. The most common surgery is removing the front part of the temporal lobe, including a hardened hippocampus (PMID 17491501).

Outcomes vary depending on the patient. Among people whose MRI-visible lesions match the sites pointed to by EEG and symptoms, 60 to 70% became seizure-free, while that proportion is lower in people whose seizures start outside the temporal lobe or who show no abnormalities on MRI (PMID 31420415).

Surgery is underutilized (PMID 31420415), and referrals for surgical evaluation are frequently delayed while trying other treatments (PMID 35842919). Based on a consensus of 61 experts from 28 countries, the ILAE Surgical Therapies Commission concluded that once drug resistance is confirmed, referral for surgical evaluation should be recommended for all drug-resistant patients up to age 70 who are fit for treatment, regardless of how long they have had epilepsy or the type of seizure. The commission added that this is an expert consensus and that a higher level of evidence is needed for it to become a clinical guideline (PMID 35842919).

For people who are poor candidates for surgery, other paths exist. Neurostimulation therapy is a treatment that uses an implanted device to send weak electrical currents to specific nerves or areas of the brain to reduce seizures. Methods include stimulating the vagus nerve in the neck, stimulating deep brain structures, and stimulating the brain in response to detected seizure onsets. In an analysis pooling 30 studies (including 6 randomized trials), seizure reduction during the initial blinded phases was similar across all three methods. In open-label follow-up studies after the trials ended, the latter two methods showed median seizure frequency reductions of 65 to 66% at 5 years and 75% at 7 to 9 years, whereas long-term follow-up data for vagus nerve stimulation were lacking. A hoarse voice or pain at the implant site were common side effects, while major complications were rare (PMID 35352349). Open-label follow-up results, complications, and costs vary across studies (PMID 39532109).

Dietary therapy can be helpful, particularly for children with epilepsy of genetic origin (PMID 39532109).

In drug-resistant focal epilepsy, surgery is the most definitive path but is used too late, and for those who cannot undergo surgery, device-based treatments offer a way to reduce seizures.

When Witnessing a Seizure

The purpose of first aid near someone having a seizure is usually to keep them safe from injury while the seizure continues (PMID 17690085). Many people misunderstand or do not know how to respond to a seizure (PMID 17690085).

The posture to use while convulsions continue varies across guidelines. In a scoping review examining 26 first-aid guidelines, 5 of 13 addressing seizure response recommended laying the person on their side during convulsions, while another 5 recommended doing so only after the seizure stopped. Because there is no evidence that laying someone on their side during convulsions reduces breathing problems and it can dislocate a shoulder or make it harder to notice if the heart has stopped, the authors concluded that this should not be recommended and should be actively discouraged unless new strong evidence emerges. For someone who is unresponsive but breathing normally after a seizure stops, the side-lying position was considered recommendable because it can prevent life-threatening breathing problems (PMID 40845810).

Putting something in the mouth is a misconception. In a meta-analysis gathering 75 studies from Arab-world countries, the belief that "putting something in the mouth makes you bite your tongue less" was the most common misconception about seizure first aid, with 38.6% of respondents believing it (PMID 41992159). The authors of a survey study asking family members and medical staff of people hospitalized for epilepsy at an Iranian hospital considered timing the seizure, loosening clothing around the neck, turning unconscious individuals onto their side, and putting nothing in the mouth to be proper responses, and concluded that standardized training is needed because both family members and medical staff often fail to respond that way (PMID 36130455). Whether the timing for turning the person onto their side is during convulsions or after they have stopped does not appear in this abstract.

Most seizures stop on their own. The problem is seizures that do not stop. Status epilepticus is a state where the body's mechanisms for stopping seizures fail or the driving forces prolonging seizures take over, causing a seizure to continue unusually long or repeat without the person waking up. Applied to a building, this is like the mechanism that stops a flashing light failing, or the side prompting the flashing growing stronger (PMID 26336950, PMID 39637874). ILAE considers a whole-body stiffening and shaking seizure lasting more than 5 minutes to be a continuing seizure, and considers that lasting consequences such as nerve cell death or injury risk arise when it exceeds 30 minutes (PMID 26336950). For children, the time to start treatment is considered 5 minutes for generalized seizures and 10 minutes for focal seizures (PMID 37714128).

These two time points are based on animal experiments and clinical studies, and ILAE notes that their evidence is incomplete and variable, so they should be viewed as the best estimates currently available (PMID 26336950). Still, the direction is clear. Status epilepticus is a common neurological emergency, and recognizing and treating it quickly can reduce the risk of complications and death (PMID 39637874).

Therefore, time is important for someone witnessing a seizure. If a seizure continues for more than 5 minutes, or restarts before the person wakes up and returns to their baseline state, it is an emergency and requires immediate medical help (PMID 26336950, PMID 39637874). Noting when the seizure started makes this judgment possible, and timing it is cited as a proper response (PMID 36130455). Also, a first-ever seizure is a serious event even if it stops on its own, so medical evaluation is sought (PMID 30948624). While someone nearby protects them, if another person is present, recording the scene on video helps with diagnosis later (PMID 33399092).

The goal when witnessing a seizure is to protect against injury, nothing is put into the mouth, seizures lasting over 5 minutes or restarting before waking up are emergencies, and a first seizure receives medical evaluation.

Rare Risks to Know

Sudden unexpected death in epilepsy occurs when a person with epilepsy dies suddenly in seemingly normal circumstances, without another cause such as an accident or drowning. It is commonly called SUDEP for short (PMID 36896633). It happens at a rate of roughly 1 in every 1,000 people with epilepsy each year (PMID 35102124). Depending on the study, the annual occurrence ranges from 0.09 to 2.4 per 1,000 people, which is interpreted as being due to differences in the ages and disease severity of the populations studied (PMID 36896633). Though rare, it is one of the leading causes of early death in people with epilepsy (PMID 35102124).

This risk is intertwined with seizures. Most cases happen after a seizure during sleep where the whole body stiffens and shakes (PMID 30456432), and having seizures within the past year, not having had seizures stop for the past 5 years, frequent tonic-clonic seizures, and nighttime seizures are cited as the strongest modifiable risk factors (PMID 35893283). The risk is highest for people whose seizures are not well controlled by medication, and it is believed that controlling convulsive seizures with medication or surgery can lower that risk (PMID 30456432). Therefore, a 2022 review names aggressive seizure control alongside education for patients and society as the most effective countermeasures available right now (PMID 35893283).

Prevention has limitations. The evidence that having someone watch nearby at night prevents sudden death is only of low quality, and other methods like seizure-detection devices have not yet proven their preventive effectiveness (PMID 33023683). Guidelines from various organizations in the United States and the United Kingdom recommend informing patients about this risk. Such education can reduce anxiety and fear (PMID 27348142).

While the mortality risk inherent to epilepsy itself is low, death rates vary greatly depending on which populations are observed. Based on whether seizures stop, the prognosis for the majority is good. Across multiple studies, about half remain seizure-free for a long time. However, reports also show that the course diverges into multiple paths, such as improving early or late, or improving and then worsening again (PMID 31852003).

Sudden unexpected death in epilepsy is rare at roughly 1 in every 1,000 people each year, and that risk is linked to uncontrolled seizures.

Stigma and Life

It is reported that for people with epilepsy, stigma causes distress and a drop in quality of life as great as the seizures themselves (PMID 34915348). When pooling 28 qualitative studies of adults, society's negative perception led to discrimination and rejection, and people endured by blaming themselves or hiding their diagnosis. The misunderstandings spread in that culture entered their minds directly and shook their lives (PMID 34915348).

Stigma connects to daily life as well. People with epilepsy have higher rates of unemployment and being unable to work than the general population, and stigma is linked to unemployment, early retirement, and low quality of life. When the diagnosis is hidden, it is also difficult to receive necessary accommodations in the workplace (PMID 42476042). Children experience a feeling of being different from others, the dilemma of whether to disclose their diagnosis, and social isolation, and it is reported that schools sometimes impose unnecessary restrictions (PMID 42308772).

Troubles of the mind come along too. Depression and anxiety can greatly affect seizure control and overall quality of life (PMID 29791945).

Attempts to reduce stigma are ongoing too. People with more knowledge about epilepsy and more social support tended to have lower self-perceived stigma (PMID 28431368). Interventions to reduce stigma reported better results more often when tailored to age and culture. However, this is an association, and most studies were conducted in high-income countries (PMID 42914581).

The stigma of epilepsy weighs down life just as much as seizures do, and one of its roots is misunderstanding.

Back to That Dinner Table

Let us return to the first son. His body grew stiff and then shook rhythmically, the shaking stopped after 1 to 2 minutes, and he did not remember it upon waking. It looks like a tonic-clonic seizure, but that alone does not tell us whether this seizure started in the whole body from the beginning or started on one side and spread (PMID 28276060). That is why the family's memory that his eyes turned to one side at first can be a clue. However, a witness's memory is often wrong, so a doctor matches that memory with other clues (PMID 33399092).

The family's job was first to keep him from getting hurt (PMID 17690085). If the seizure had lasted longer than 5 minutes or started again before he woke up, it would have been an emergency (PMID 26336950, PMID 39637874). This time, it stopped on its own.

If it is a first seizure, you get medical care (PMID 30948624). The doctor listens closely to the story of that day. The possibility that it was a fainting spell or another event is also sorted out there (PMID 33399092). An electroencephalogram (EEG) and brain imaging are also part of the evaluation (PMID 18025394).

A single seizure does not mean epilepsy (PMID 24730690). If there is an abnormality on the EEG, the risk of it happening again is high (PMID 18025394), and if there is an abnormality on the EEG or MRI, medication can be considered even after a single seizure (PMID 35380580). Even if diagnosed with epilepsy, about 60 to 70% live without seizures using medication (PMID 35380580), and if it is not controlled by two medications, there is a next path called a surgery evaluation (PMID 35842919). Which tests to receive and which treatment to choose are things to decide together with a doctor in the examination room.

Where to Look Further

Treatments that change the course of the disease itself are not yet available, while treatments targeting the causes are being developed (PMID 37352888), and methods to prevent sudden unexpected death in epilepsy have not yet been proven either (PMID 33023683).

How nerve cells generate and pass signals continues in "How Do Nerve Cells Send Signals? — A Burning Fuse, a Gap Crossed by Ferry", and the locations of the temporal lobe and hippocampus continue in "The Map of the Brain — Neighborhoods with Their Own Jobs, a City Joined by Roads". Stroke, a common cause of epilepsy later in life, is covered by "What a Stroke Actually Is — Blocked, Burst, and the Clock". Other diseases of the brain and nerves continue in "What Is Parkinson's Disease? — An Orchestra Whose Conductor Is Fading, a First Beat That Comes In Late", "Headache and Migraine — A Bell That Rings Easily, a Threshold That Falls as Attacks Grow Frequent", and "Numbness and Peripheral Neuropathy — The Long Supply Line That Runs Short at the Farthest Village, the Sock That Climbs From the Toes".

Source Papers

• "ILAE official report: a practical clinical definition of epilepsy." (2014) — PMID 24730690 — Three prongs of the practical definition of epilepsy (2 unprovoked seizures >24 hours apart / 1 + >60% 10-year recurrence risk / epilepsy syndrome), definition of 「resolved」 (10 years seizure-free and 5 years off meds), resolved is not the same as cured.
• "Antiseizure Medications for Adults With Epilepsy: A Review." (2022) — PMID 35380580 — Definition of seizure (abnormal, excessive, or synchronous neuronal activity), roughly 65 million people worldwide, 20–40% 1-year injury risk during ongoing seizures, starting medication is individualized (strongly considered after 2 unprovoked seizures or 1 + sleep/EEG/MRI abnormalities), seizure-free in roughly 60–70%, comorbid conditions 25–50%, lipid and bone effects of enzyme-inducing drugs.
• "First seizure presentations in adults: beyond assessment and treatment." (2019) — PMID 30948624 — Roughly 10% of people have a seizure at least once in their lifetime, first seizures can be triggered by metabolic abnormalities, drug toxicity, or structural lesions, meticulous assessment and early specialist evaluation, accidents, injuries, and deaths may be underestimated.
• "[Evaluation of a child with a first unprovoked seizure]." (2018) — PMID 30199358 — Distinguishing non-epileptic events, symptomatic seizures, febrile seizures, and unprovoked seizures, 23–96% recurrence rate after a first unprovoked seizure (median follow-up 2 years), the most important predictors are etiology and EEG abnormalities.
• "The Epidemiology of Epilepsy." (2020) — PMID 31852003 — Definition of epilepsy (an enduring predisposition to generate seizures occurring in the absence of an acute central nervous system insult), older age peak is driven by stroke, degenerative diseases, and tumors, focal seizures are more common than generalized seizures, roughly 50% have no identified cause even in high-income countries, roughly half achieve long-term remission, variable course, low risk of death from epilepsy itself.
• "Epilepsy in adults." (2019) — PMID 30686584 — Over 70 million people worldwide, incidence peaks in infancy and older age, a symptom complex with strong genetic predispositions, witness accounts are the cornerstone of diagnosis, medications suppress seizures in up to two-thirds but do not change long-term prognosis, surgery is most effective in drug-resistant focal epilepsy selected for it.
• "How to distinguish seizures from non-epileptic manifestations." (2020) — PMID 33399092 — Distinguishing conditions such as syncope and psychogenic nonepileptic seizures, patient and witness history and home videos are the main tools, statements have a high rate of inaccuracy, misdiagnosis is dangerous in both directions.
• "Updated classification of epileptic seizures: Position paper of the International League Against Epilepsy." (2025) — PMID 40264351 — Four branches of focal, generalized, unknown, and unclassifiable, focal and unknown are classified by awareness (impaired/preserved), generalized includes absence, tonic-clonic, and others, 21 seizure types, aiming for terminology patients and caregivers can use.
• "A practical guide to the updated seizure classification 2025." (2025) — PMID 41081650 — Awareness is defined by awareness (memory) and responsiveness.
• "Epilepsy Overview and Revised Classification of Seizures and Epilepsies." (2019) — PMID 30921011 — Classification starts with whether the first symptom is focal or generalized, non-motor generalized seizures are predominantly absence seizures.
• "Operational classification of seizure types by the International League Against Epilepsy: Position Paper of the ILAE Commission for Classification and Terminology." (2017) — PMID 28276060 — 「Focal to bilateral tonic-clonic」 replaces secondary generalization, some seizure types can have either focal or generalized onset.
• "ILAE classification of the epilepsies: Position paper of the ILAE Commission for Classification and Terminology." (2017) — PMID 28276062 — Six etiology subcategories considered at each diagnostic step, therapeutic implications.
• "Evaluation of Seizure Etiology From Routine Testing to Genetic Evaluation." (2019) — PMID 30921012 — Structural, metabolic, genetic, infectious, and immune causes, acquired cause identified in 30% of established epilepsy, remaining 70% presumed genetic.
• "Sudden Unexpected Death in Epilepsy." (2022) — PMID 35893283 — Strongest modifiable risk factors (past-year seizures, tonic-clonic seizure frequency, nocturnal seizures), increased risk when antiseizure medications are missed, avoiding heavy drinking and sleep deprivation, proactive seizure control and education are the most effective measures.
• "Practice Parameter: evaluating an apparent unprovoked first seizure in adults (an evidence-based review)." (2007) — PMID 18025394 — Roughly 23% EEG abnormalities in adults with a first unprovoked seizure (predicting recurrence), 10% imaging abnormalities, up to 15% blood test abnormalities but mild and non-causative, EEG and imaging recommended (Level B), blood tests and lumbar puncture have insufficient evidence (Level U).
• "The Pharmacology and Clinical Efficacy of Antiseizure Medications: From Bromide Salts to Cenobamate and Beyond." (2021) — PMID 34145528 — Roughly 30 agents, mechanisms of action (ion channels, enhancing GABA inhibition, synaptic release, blocking glutamate receptors), most fail to suppress all seizures, complete seizure freedom unattainable in roughly one-third, also approved for neuropathic pain, migraine, and others.
• "Advances in Therapy for Refractory Epilepsy." (2025) — PMID 39532109 — Definition of drug resistance (failure of adequate trials of two appropriate medications), one-third, newer drugs are easier to tolerate but not more effective, resective surgery is standard, laser ablation has less burden and lower efficacy, neurostimulation, dietary therapy (especially for pediatric genetic epilepsy), and gene therapy are under research.
• "Drug resistance in epilepsy." (2023) — PMID 37352888 — Roughly one-third, probability of seizure freedom with a new drug decreases as the number of failed drugs increases, re-evaluation at a specialized center after two failed drugs, treatment delay worsens outcomes, drug resistance does not mean unresponsiveness to all medications, disease-modifying treatments under research.
• "Incidence and Prevalence of Drug-Resistant Epilepsy: A Systematic Review and Meta-analysis." (2021) — PMID 33722992 — 103 papers, prevalence 13.7% in population-based vs 36.3% in hospital-based settings, high heterogeneity and risk of bias.
• "Sudden unexpected death in epilepsy." (2022) — PMID 35102124 — SUDEP roughly 1/1,000 patient-years, similar in children and the elderly, modifiable risks (generalized convulsive seizure frequency, medication adherence, nocturnal supervision).
• "Epilepsy surgery." (2007) — PMID 17491501 — Probability of response to subsequent drugs is low after the first two or three fail, pre-surgical evaluation (MRI, prolonged video-EEG, neuropsychology), most common surgery is anterior temporal lobectomy including the hardened hippocampus.
• "Epilepsy surgery." (2020) — PMID 31420415 — 60–70% seizure-free when MRI lesions match electrical and clinical findings, lower in extratemporal or normal MRI cases, surgery is underutilized.
• "Timing of referral to evaluate for epilepsy surgery: Expert Consensus Recommendations from the Surgical Therapies Commission of the International League Against Epilepsy." (2022) — PMID 35842919 — Delphi consensus of 61 experts across 28 countries, refer all patients up to age 70 for surgical evaluation as soon as drug resistance is identified, treatment guidelines require higher evidence.
• "Neurostimulation in people with drug-resistant epilepsy: Systematic review and meta-analysis from the ILAE Surgical Therapies Commission." (2022) — PMID 35352349 — 30 papers (6 RCTs), three methods similar during blinded phases, open-label extension reductions of RNS 53, 66, and 75% (at 2, 5, and 9 years) and DBS 56, 65, and 75% (at 2, 5, and 7 years), long-term data for VNS lacking, common side effects include raspy voice and implant-site pain.
• "First aid for seizures: the importance of education and appropriate response." (2007) — PMID 17690085 — Purpose of first aid is to protect from injury during a seizure, misconceptions and lack of knowledge, contributes to stigma, preventing status epilepticus is one of the goals, positive effects of education.
• "A definition and classification of status epilepticus--Report of the ILAE Task Force on Classification of Status Epilepticus." (2015) — PMID 26336950 — Abnormally prolonged seizure due to failure of termination mechanisms, generalized tonic-clonic t1 5 minutes and t2 30 minutes, animal and clinical evidence incomplete so best estimate.
• "[Update on status epilepticus in children. Definition, classification and treatment]." (2023) — PMID 37714128 — Pediatric treatment initiation threshold is 5 minutes for generalized tonic-clonic and 10 minutes for focal.
• "Diagnosis and management of status epilepticus: improving the status quo." (2025) — PMID 39637874 — Seizures that are prolonged or repetitive without recovery, a common neurological emergency, rapid recognition and treatment reduce complication and mortality risks.
• "Sudden unexpected death in epilepsy: A critical view of the literature." (2023) — PMID 36896633 — Definition of SUDEP (sudden, unexpected death in normal circumstances, not due to trauma or drowning), incidence 0.09–2.4/1,000 patient-years.
• "Autonomic aspects of sudden unexpected death in epilepsy (SUDEP)." (2019) — PMID 30456432 — Mostly following convulsive seizures during sleep, risk highest in drug-resistant patients, seizure control can lower risk.
• "Can We Prevent Sudden Unexpected Death in Epilepsy (SUDEP)?" (2021) — PMID 33023683 — No proven prevention methods other than low-quality evidence for nocturnal supervision.
• "Sudden Unexpected Death in Epilepsy (SUDEP): Are All Your Patients Informed?" (2016) — PMID 27348142 — US and UK guidelines recommend SUDEP education, education reduces anxiety and fear while alleviating family grief and self-blame.
• "Experiences of stigma in people with epilepsy: A meta-synthesis of qualitative evidence." (2022) — PMID 34915348 — 28 papers, stigma as distressing as seizures and impacts quality of life, discrimination, self-blame, hiding the condition, internalization of cultural misconceptions, importance of education.
• "[Impact of epilepsy-related stigma on employability: A review of the evidence for primary care practice]." (2026) — PMID 42476042 — Increased unemployment and work impairment, stigma linked to unemployment, early retirement, and lower quality of life, concealing the diagnosis prevents workplace accommodations.
• "What is the impact of stigma on the wellbeing of children with epilepsy?: A qualitative systematic literature review." (2026) — PMID 42308772 — 11 papers, feeling different, worry about disclosing the diagnosis, social isolation, unnecessary school restrictions.
• "Global Health: Epilepsy." (2018) — PMID 29791945 — Misconceptions and stigma are major burdens, depression and anxiety greatly affect seizure control and quality of life.
• "Correlates of perceived stigma for people living with epilepsy: A meta-analysis." (2017) — PMID 28431368 — Knowledge, social support, and quality of life negatively correlate with perceived stigma.
• "Addressing stigma in epilepsy care: a systematic review of personalized anti-stigma interventions." (2026) — PMID 42914581 — 74 papers, higher personalization level reports higher proportion of good outcomes (association), mostly high-income countries.
• "Recovery position for generalised seizures: A focused scoping review of guidelines and original research." (2025) — PMID 40845810 — 13 of 26 first-aid guidelines cover seizures, split evenly between turning on the side during convulsions (5) vs only after cessation (5), no evidence that lateral recovery position during convulsions reduces respiratory problems and risks shoulder dislocation and delayed cardiac arrest recognition, authors' conclusion: avoid recommendation during convulsions; recommend recovery position after seizures if unresponsive and breathing normally.
• "Attitudes and misconceptions surrounding epilepsy and first aid of seizures in the Eastern Mediterranean Region: a systematic review and meta-analysis." (2026) — PMID 41992159 — 75 papers and 61,681 individuals in the Arabic-speaking region, most common first-aid misconception 「putting an object in the mouth reduces tongue biting」 38.6%.
• "Seizure first aid for people with epilepsy: opinions and knowledge of caregivers and healthcare professionals." (2022) — PMID 36130455 — Hospital and community survey in Shiraz, Iran (583 nurses, 70 physicians, 133 family members), appropriate responses include timing, loosening clothing around the neck, turning to the side if unresponsive, putting nothing in the mouth, and not calling an ambulance for every seizure.