Subclinical seizure

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A Subclinical seizure is a type of seizure often experienced by people with epilepsy, in which an EEG trace will show abnormal brain activity, usually for a short duration of time but which does not present any noticeable clinical signs or symptoms. This is often manifest as a single spike on the EEG trace or a slowing of brain activity not correlating to their level of consciousness or awareness. Subclinical seizures can be useful to a neurologist when displayed on an EEG in the diagnosis of epilepsy.