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Epilepsy is defined by a long-term tendency for recurrent, unprovoked seizures; diagnosis usually requires at least two unprovoked seizures more than 24 hours apart (or one seizure with high recurrence risk).
Epilepsy is a group of neurological disorders defined by a long-term tendency to have recurrent, unprovoked seizures. A seizure is a sudden burst of abnormal electrical activity in the brain that can cause symptoms ranging from brief lapses of awareness or muscle jerks to prolonged convulsions. Epilepsy is typically diagnosed when a person has at least two unprovoked seizures occurring more than 24 hours apart, though in some cases it may be diagnosed after a single unprovoked seizure if the risk of recurrence is high. Isolated seizures that do not recur or are provoked by identifiable causes are not considered epilepsy. Core features include the variety of seizure types and their clinical patterns, as well as the typical course and impact of the condition. Seizures are commonly classified into focal, generalized, unknown (focal or generalized not determined), and unclassified. Focal seizures begin in one brain region and may spread, sometimes with preserved or impaired awareness; generalized seizures rapidly involve both hemispheres and can include tonic-clonic, absence, myoclonic, atonic, and other forms. Epilepsy also includes characteristic post-seizure recovery (postictal state), possible psychosocial and mental health effects, and identifiable triggers that lower the seizure threshold (such as sleep deprivation, stress, fever, illness, menstruation, alcohol, and certain medications).
Epilepsy is defined by a long-term tendency for recurrent, unprovoked seizures; diagnosis usually requires at least two unprovoked seizures more than 24 hours apart (or one seizure with high recurrence risk).
Seizures show core clinical variability and are classified into focal, generalized, unknown, and unclassified types, each with characteristic effects on awareness and body behavior.
Epilepsy commonly involves a postictal recovery period and may be influenced by triggers that lower the seizure threshold, alongside significant psychosocial and mental health impacts.
A neurological disorder characterized by a long-term tendency to experience recurrent, unprovoked seizures.
A sudden burst of abnormal electrical activity in the brain that can produce a range of symptoms from brief awareness lapses to convulsions.
A seizure occurring without an immediate identifiable trigger such as an acute toxic or metabolic cause.
A seizure that originates in one area of the brain and may remain localized or spread, often affecting awareness depending on the network involved.
A seizure that begins within and rapidly spreads across both hemispheres, typically impairing consciousness from the outset.
The recovery period after the seizure (ictal phase) marked by confusion or other neurological symptoms that can last minutes to days.
An external or internal factor (e.g., sleep deprivation, stress, fever) that increases seizure likelihood by lowering the threshold in susceptible individuals.
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