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The most common type (60%) of seizures are convulsive which involve involuntary muscle contractions. [26] Of these, one-third begin as generalized seizures from the start, affecting both hemispheres of the brain and impairing consciousness. [26]
A simple partial seizure may go unnoticed by others or shrugged off by the patient as merely a "funny turn." Focal aware seizures usually start suddenly and are very brief, typically lasting 60 to 120 seconds. [10] [failed verification] Some common symptoms of a simple partial seizure are: [7] [failed verification] preserved consciousness
It is recommended to start with one anti-seizure medication. [5] [59] Another may be added if one is not enough to control the seizure occurrence. [59] Approximately 70% of people can obtain full control with continuous use of medication. [60] The type of medication used is based on the type of seizure. [5] [59]
A brain injury can cause seizure(s) because of the unusual amount of energy that is discharged across of the brain when the injury occurs and thereafter. A disruption of the supply of oxygen may cause damage to the temporal lobe of the brain. [35] The risk of seizure(s) from a closed head injury is about 15%. [36]
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A seizure is a paroxysmal episode of symptoms or altered behavior arising from abnormal excessive or synchronous brain neuronal activity. [5] A focal onset seizure arises from a biological neural network within one cerebral hemisphere, while a generalized onset seizure arises from within the cerebral hemispheres rapidly involving both hemispheres.