![]() ![]() There are many different types of seizures, but the major distinction that doctors try to make is between focal seizures, where the seizure arises in one part of the brain (usually on one side of the brain) and generalised seizures, where epileptic activity begins all over the brain (on both sides of the brain) simultaneously. What happens during a seizure reflects what parts of the brain are involved. This may create a temporary disturbance in the way the brain controls awareness and responsiveness and may cause unusual sensations or abnormal movements and postures. Seizures occur when there is a momentary 'imbalance' within electrical and chemical circuits in the brain, such that groups of brain cells act in an excessive fashion. Some epilepsies are due to an underlying abnormality of the brain structure or chemistry (formerly called symptomatic or secondary epilepsies). Genetic epilepsies (formerly called idiopathic or primary epilepsies) occur in an otherwise normal person and are due to a genetic predisposition to seizures. ![]() the site of seizure origin in the brain (generalised or focal seizures), or.Epilepsy can be thought of in terms of either: ![]() There are many different types of epilepsy, especially in infancy, childhood and adolescence. About 1 in 200 children (0.5%) have epilepsy, a neurological condition where children have a predisposition to recurrent, unprovoked seizures. 1 in 20 children (5%) will have a seizure of some form during childhood. Many people in the community have seizures. ![]()
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