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Epilepsy Terms
Learn the words you’ll hear in epilepsy care, explained in a clear, parent-friendly way
This page is for education only and does not replace medical advice, diagnosis, or your child’s individualized care plan.
Why These Words Matter
When you understand the words being used, it is easier to ask questions, explain what you are seeing, follow care plans, and advocate for the right supports. You do not need to speak like a neurologist to be taken seriously. You just deserve clear explanations
Plain language matters
A term like focal seizure, postictal, or rescue medication can change how a care plan is written. Knowing what the words mean helps families describe seizures more clearly and understand what the medical team is looking for
Seizure Basics
These are the foundation words families often hear first
Seizure
A seizure is a sudden burst of abnormal electrical activity in the brain. It can affect movement, awareness, behavior, breathing, sensations, or how someone feels afterward
Why it matters: Not every seizure looks like shaking. Some are subtle, quiet, or mainly affect awareness, breathing, or behavior
Seizure threshold
Seizure threshold means how likely the brain is to have a seizure. Some things may lower the threshold, making seizures more likely
Why it matters: Every person has a seizures threshold; illness, missed sleep, missed medication, fever, flashing lights in some people, or stress can sometimes make seizures more likely
Aura
An aura is actually a seizure symptom that can happen at the beginning of a focal seizure. It may feel like a strange sensation, smell, fear, nausea, déjà vu, or another warning feeling
Why it matters: Some people use the word aura like a warning sign, but medically it can be the start of the seizure itself
Epilepsy
Epilepsy means a person has a tendency to have recurring seizures. One seizure does not always mean someone has epilepsy
Why it matters: Epilepsy is not one single condition. It can look very different from person to person
Trigger
A trigger is something that may make seizures more likely for a specific person
Why it matters: Triggers are different for everyone. A seizure diary can help families notice patterns
Postictal
Postictal means the recovery period after a seizure
Why it matters: A person may be sleepy, confused, emotional, weak, nauseated, or not back to baseline yet. For some people, recovery is the part that needs the closest watching
Seizure Descriptions
Words / names often describe where the seizure starts and what the body does during the seizure
Focal seizure
A seizure that starts in one area or one side of the brain
Why it matters: Focal seizures can look very different depending on where they start
Unknown onset seizure
A seizure where it is not clear whether it started focal or generalized
Why it matters: Sometimes more EEG, video, or history is needed before the seizure type becomes clearer
Clonic
Rhythmic jerking movements
Why it matters: Clonic movements are often what people notice during convulsive seizures
Automatisms
Repetitive movements during a seizure, such as lip smacking, chewing, swallowing, picking at clothes, rubbing hands, or wandering
Why it matters: Automatisms can make a seizure look like behavior, confusion, or intentional movement
Eye fluttering
Rapid blinking or fluttering of the eyelids
Why it matters: This may occur with absence seizures, eyelid myoclonia, or other seizure types
Lip smacking
Repeated chewing, mouth movements, or lip movements during a seizure
Why it matters: This can be an automatism and may point toward focal seizure activity
Aware seizure
A seizure where the person remains aware of what is happening
Why it matters: A person can be fully aware and still be having a seizure
Behavioral arrest
A sudden pause in activity where the person stops what they are doing
Why it matters: This can look like freezing, staring, or suddenly “checking out”
Generalized seizure
A seizure that appears to involve both sides of the brain from the beginning and may cause loss of consciousness
Why it matters: Generalized seizure types often affect medication and safety planning
Focal to bilateral tonic clonic seizure
A seizure that starts in one area of the brain and then spreads to involve both sides
Why it matters: This is different from a generalized tonic clonic seizure that starts on both sides from the beginning
Tonic
Stiffening of the muscles
Why it matters: Tonic stiffening may affect breathing, posture, and safety
Eye deviation
Eyes turning or pulling to one side during a seizure
Why it matters: This can be an important clue for focal seizure onset
Nystagmus
Fast, repetitive eye movements
Why it matters: This can sometimes be seen during seizures or as a medication side effect
Staring spell
A period where the person appears to stare, pause, or not respond
Why it matters: Staring can be absence seizures, focal impaired awareness seizures, daydreaming, attention issues, or something else
Impaired awareness seizure
A seizure where awareness is changed or reduced
Why it matters: The person may seem awake but not respond normally, remember what happened, or act like themselves
Speech arrest
A sudden inability to speak during a seizure
Why it matters: This can be a focal seizure clue and should be described clearly to the care team
EEG
An EEG is a test that records electrical activity in the brain using small sensors on the scalp
Why it matters: EEGs can help show patterns that support a diagnosis of epilepsy or help classify seizure type
Spike and wave
A type of EEG pattern often discussed in generalized epilepsy, especially absence seizures
Why it matters: It can help the neurologist understand what kind of epilepsy pattern may be present
MRI
An MRI is an imaging test that looks at brain structure
Why it matters: It can help look for structural causes of seizures, such as scars, malformations, tumors, or areas that developed differently
Sleep-deprived EEG
An EEG done after the person has had less sleep than usual
Why it matters: Sleep deprivation can sometimes make epileptiform activity more likely to show up
Continuous EEG
EEG monitoring that runs for a long period, often in hospital or ICU
Why it matters: It can help detect seizures that are not obvious from the outside
Background activity
The usual brain wave pattern seen between events on an EEG
Why it matters: The background can tell doctors how the brain is functioning between seizures
Subclinical seizure
A seizure seen on EEG that may not have obvious outward signs
Why it matters: This can happen in hospitalized or medically complex patients and may require treatment even if it is not visible
EEG & Testing Terms
These words often appear in reports or neurology appointments
Epileptiform activity
A pattern on EEG that can be associated with a higher likelihood of seizures
Why it matters: It does not always mean a seizure is happening at that moment, but it can support the diagnosis
Seizure focus
The area of the brain where seizures may be starting
Why it matters: A seizure focus is especially relevant in focal epilepsy
Video EEG
A test that records EEG and video at the same time
Why it matters: It helps connect what is happening on the EEG with what the seizure looks like on camera
Ambulatory EEG
An EEG done while the person goes about daily life, usually outside the hospital
Why it matters: It can capture events that do not happen during a short clinic test
Slowing
EEG activity that is slower than expected
Why it matters: Slowing can suggest the brain is irritated, injured, sleepy, developing differently, or recovering from illness or seizures. It is not the same thing as a seizure
Ictal
During a seizure
Why it matters: Ictal EEG changes show what is happening while the seizure is occurring
Nonconvulsive seizure
A seizure without obvious convulsive shaking
Why it matters: The person may look confused, still, sleepy, or “not right,” and EEG may be needed to confirm it
Anti seizure medication
Medication used to reduce or prevent seizures. You may also hear ASM or AED
Why it matters: Many people still say “antiepileptic drug” or AED, but “anti seizure medication” is becoming more common
Dose
The amount of medication given at one time
Why it matters: Dose may be based on age, weight, blood levels, response, side effects, and the medication being used
Therapeutic level
A medication blood level that is expected to be helpful or within a target range
Why it matters: For some medications, levels help guide dosing. For others, symptoms and seizure response matter more than a number
Medication Terms
These terms help families understand medication plans and pharmacy instructions
Rescue medication
Medication used for seizure emergencies, seizure clusters, or seizures that last longer than the person’s plan allows
Why it matters: Rescue medication is not usually the same as daily medication. It should be written clearly in a seizure action plan
Titration
Slowly increasing or decreasing a medication dose
Why it matters: Some medications must be started slowly to reduce side effects or safety risk
Breakthrough seizure
A seizure that happens even though the person is on medication or usually has better control
Why it matters: Breakthrough seizures can signal illness, missed doses, medication level issues, growth, sleep changes, or a need to adjust the plan
Seizure action plan
A written plan explaining what to do during and after a seizure
Why it matters: It should include when to use rescue medication, when to call emergency services, and what recovery should look like for that person
Status epilepticus
A seizure emergency where a seizure lasts too long or seizures repeat without recovery
Why it matters: Many emergency plans use 5 minutes as an important action point, but the person’s written plan should guide care
Apnea
A pause in breathing
Why it matters: Apnea during or after a seizure should be taken seriously, especially if oxygen drops or recovery is slow
Postictal breathing
Breathing during the recovery period after a seizure
Why it matters: The seizure may look like it has ended, but breathing and recovery may still need close watching
Tachycardia
A heart rate that becomes faster than expected
Why it matters: Heart rate often rises during stress or seizures, but the full pattern matters, especially if it later drops quickly
Emergency and Safety Terms
These are the words families may hear in seizure action plans, hospital care, or emergency response
Seizure cluster
Two or more seizures close together, depending on the person’s usual pattern and medical plan
Why it matters: Some people have rescue medication specifically for clusters
Cyanosis
Bluish or grayish color, often seen around the lips, face, or skin when oxygen is low
Why it matters: Color change during or after a seizure can be a serious breathing sign
Oxygen desaturation
A test that records EEG and video at the same time
Why it matters: Some families monitor oxygen with a pulse oximeter. Severe or prolonged drops should be discussed with the medical team
Bradycardia
A heart rate that becomes slower than expected
Why it matters: If the heart rate drops during or after a seizure, especially after apnea or oxygen desaturation, it should be discussed with the medical team
Autonomic symptoms
Body system changes controlled automatically, such as heart rate, breathing, sweating, flushing, vomiting, pupils, or color change.
Why it matters: Some focal seizures mainly show up through autonomic changes instead of obvious shaking
Baseline
What is normal for that person when they are well
Why it matters: For medically complex children, baseline may look different from other children. Knowing baseline helps caregivers notice what has changed
Refractory epilepsy
Epilepsy that is difficult to control with medication
Why it matters: This may lead to discussions about different medications, diet therapy, devices, surgery evaluation, or specialized epilepsy car
Neurologist
A doctor who specializes in the brain and nervous system
Why it matters: Many children with epilepsy are followed by a neurologist
Care Planning Terms
These terms help families talk clearly about daily care, appointments, and advocacy
Return to baseline
When the person has recovered back to their usual state after a seizure or illness
Why it matters: If someone does not return to baseline the way they normally do, that may be a red flag
Seizure diary
A record of seizures, symptoms, triggers, medications, recovery, and patterns
Why it matters: A good seizure diary can help the medical team see trends that may not be obvious from memory alone
Epileptologist
A neurologist with specialized training in epilepsy
Why it matters: An epileptologist may be involved when epilepsy is complex, severe, life-threatening, unclear, or difficult to control
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