01
Staring and reduced responsiveness
A brief pause in interaction or a partial loss of awareness of the surroundings.
Epilepsy & Seizures
Epilepsy & Seizures Understand the event first, then build a more accurate diagnosis and follow-up plan
Not every convulsive event is epilepsy, and not every epileptic seizure causes a fall or obvious shaking. Assessment starts with a detailed description of what happened, followed by neurological examination and then the investigations that are relevant to the clinical question, such as EEG or MRI.
Short answer:
epilepsy is primarily a clinical diagnosis and should not be diagnosed or excluded from an EEG result alone.
A clear definition
What is Epilepsy, and how is it different from a seizure?
An epileptic seizure is a transient event caused by abnormal electrical activity in the brain. It can affect consciousness, movement, sensation or behavior.
Epilepsy is a neurological disease characterized by an enduring tendency to have epileptic seizures. Under the ILAE practical clinical definition, epilepsy may be diagnosed after two unprovoked seizures more than 24 hours apart, after one unprovoked seizure when the recurrence risk is sufficiently high, or when an epilepsy syndrome is diagnosed.
A single convulsive event therefore does not automatically mean epilepsy. Syncope, sleep disorders, metabolic disturbance and cardiac conditions can sometimes resemble seizures.
01
A seizure is not always a convulsion
It can present as brief staring, unusual sensation, automatic behavior or a temporary change in consciousness.
02
EEG is a supportive test
EEG can support diagnosis and seizure classification, but it should not be used alone to exclude epilepsy.
03
Treatment is individualized
Seizure type, age, likely cause, test findings, other medicines and patient circumstances all affect treatment decisions.
How can a seizure appear?
Epilepsy and seizure symptoms may be more subtle than expected
The appearance of a seizure depends on the neural networks involved. The beginning, sequence and duration of the event are therefore important parts of the medical assessment.
02
Involuntary jerking or movements
Movements may affect one limb or more and can be very brief or more prolonged.
03
Sensory changes
Unusual smell or taste, tingling, visual symptoms or auditory changes.
04
Repeated automatic behaviors
Repetitive mouth or hand movements associated with altered consciousness or reduced responsiveness.
05
Generalized stiffening and rhythmic jerking
Some seizures cause loss of consciousness followed by body stiffening and repeated rhythmic limb movements.
06
Confusion or fatigue afterward
Some people need time to regain their usual awareness and concentration after the seizure ends.
Updated ILAE 2025 classification
The four main seizure classes
The 2025 ILAE classification uses four main seizure classes — focal, generalized, unknown whether focal or generalized, and unclassified — with additional descriptors for observable features and the sequence of symptoms.
Focal seizures
Seizures belonging to a focal network class; consciousness and observable features can vary between events.
Generalized seizures
Seizures belonging to generalized brain-network classes and including different motor and non-motor manifestations.
Unknown whether focal or generalized
The event is considered epileptic, but available information is insufficient to determine whether it belongs to the focal or generalized class.
Unclassified seizures
Used when the available clinical information is not sufficient for reliable classification into another class.
From the event description to diagnostic testing
How is Epilepsy diagnosed?
No single test answers every question about seizures. The neurologist combines the event description with the clinical examination, then selects tests that can answer specific diagnostic questions.
01
Event description and eyewitness history
How did it start? What happened during it? How long did it last? What happened during recovery? A safe video can sometimes help the clinician.
02
Neurological examination and medical history
Review medicines, previous conditions, family history and possible provoking or alternative explanations.
03
EEG
EEG can support diagnosis and provide information about seizure type or epilepsy syndrome. Sleep, prolonged, ambulatory or Video EEG may be considered when clinically appropriate.
04
Other tests when indicated
Assessment may include ECG, laboratory testing or MRI to look for mimics, metabolic causes or structural abnormalities depending on the clinical situation.
A frequently asked question
Does a normal EEG rule out Epilepsy?
No. A routine EEG can be normal between seizures in people who have epilepsy. NICE explicitly advises not to use EEG to exclude a diagnosis of epilepsy. When diagnostic uncertainty remains, the clinician may consider sleep-deprived or ambulatory EEG, or other forms of prolonged recording depending on the case.
Individualized care rather than one treatment for everyone
Epilepsy treatment and follow-up
The goal is to control seizures while balancing effectiveness, safety, underlying cause, seizure pattern and the patient's individual circumstances.
Medication
Choose an antiseizure medicine that fits the seizure type and patient
Medication choice, dose and monitoring vary between patients. Do not start, stop or change the dose of antiseizure medication on your own.
Follow-up
Track seizures, response and side effects
Timing, duration, circumstances and response to treatment provide practical information for follow-up and treatment adjustment.
Sleep & lifestyle
Reduce triggers that have clearly been relevant for that patient
Sleep deprivation or missed medication can be important for some patients, but triggers differ and there is no single list that applies to everyone.
Drug-resistant epilepsy
Additional options may be considered when seizures remain uncontrolled
Selected patients may need specialist evaluation for options such as epilepsy surgery, neurostimulation or specialized dietary therapy within an appropriate epilepsy-care team.
Practical safety information
What to do if someone has a convulsive seizure
Stay calm and protect the person from injury rather than trying to stop the movements by force.
Do
- Move hard or sharp objects away and protect the head with something soft if possible.
- Time the seizure from the beginning.
- When the convulsive movements stop, gently turn the person onto their side if it is safe to do so.
- Stay with the person until they recover to their usual level of awareness.
Avoid
- Do not put anything in the person's mouth or force the jaw open.
- Do not restrain the limbs or try to stop the movements.
- Do not give food, drink or oral medicine until the person is fully alert.
- Do not move the person unless there is immediate danger in the current location.
When is urgent medical help needed?
Seek emergency help if this is the person's first seizure, if a convulsive seizure lasts longer than 5 minutes,
if another seizure begins before recovery, if a serious injury occurs, or if the person has difficulty breathing or waking afterward.
Use the official emergency service for the location where the event occurs.
Educational videos from Dr. Karim Ashraf
Videos about Epilepsy and Seizures
General educational content that does not replace individual medical assessment.
Reducing seizure recurrence
General discussion of factors related to seizure control and the importance of consistent treatment and follow-up.
Epilepsy treatment and antiseizure medication
An educational discussion about medication and why treatment should not be changed or stopped without medical supervision.
Specialist assessment of seizures and brain electrical disorders
Dr. Karim Ashraf
Consultant Neurologist
Epilepsy assessment does not start with an EEG alone. It starts with understanding the event and the context in which it happened, then connecting that information to the neurological examination and relevant investigations.
Doctorate in Neurology — Faculty of Medicine, Ain Shams University.
Neurophysiology — Cleveland Clinic Foundation.
Advanced Epilepsy Treatment — International League Against Epilepsy.
Related NeuroVisit guides
Continue with related information
Direct answers
Frequently Asked Questions About Epilepsy & Seizures
Does every convulsive seizure mean the person has epilepsy?
No. Seizures and convulsive events can have other causes. Epilepsy diagnosis depends on the event description, clinical context and the estimated risk of further unprovoked seizures.
Is one seizure enough to diagnose epilepsy?
Not always. Epilepsy can be diagnosed in selected circumstances after one unprovoked seizure when the recurrence risk is sufficiently high, or when a defined epilepsy syndrome is diagnosed. It can also be diagnosed after two unprovoked seizures occurring more than 24 hours apart.
Does a normal EEG rule out epilepsy?
No. A routine EEG can be normal between seizures. NICE specifically advises not to use EEG to exclude epilepsy. The result is interpreted with the history, examination and event description.
When is Video EEG useful?
Video EEG can be useful when the clinician needs to correlate what happens to the patient with electrical brain activity, when the nature of events is uncertain, or when longer monitoring is needed.
Can a seizure occur without complete loss of consciousness?
Yes. Some focal seizures occur with preserved or partially preserved consciousness, while other seizure types affect responsiveness and awareness to different degrees.
Should antiseizure medication be stopped if seizures have stopped?
Do not stop or reduce antiseizure medication on your own. Any decision to reduce or stop treatment depends on several clinical factors and should be discussed with the treating clinician.
What information should I prepare before the neurology appointment?
Write down how the event started, how long it lasted and what happened afterward. Bring a medication list and previous reports or scans. A safe video of an event can sometimes be helpful when available and appropriate.
Can epilepsy be controlled with treatment?
Yes for many patients. The World Health Organization estimates that up to 70% of people with epilepsy could become seizure-free with appropriate diagnosis and treatment.
Medical references:
ILAE — Seizure Classification 2025
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ILAE — Definition of Epilepsy
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NICE — Diagnosis & EEG
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WHO — Epilepsy
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CDC — Seizure First Aid
Start with a clear assessment of Epilepsy and seizure symptoms
Book a neurology consultation to review the event description, medical history and previous investigations, and decide the appropriate diagnostic and follow-up pathway.