PARTIAL (FOCAL) SEIZURES.

An encyclopedia entry for "partial (focal) seizures" is presented. Partial seizures which have a focal onset are associated with localization-related epilepsy and reflect seizures arising from neuroanatomic or functional neuronal activation restricted to part of one hemisphere. Most commonly originating in the temporal lobes, partial seizures are divided into three groups, including simple partial seizures without impairment of consciousness and complex partial seizures with impaired consciousness.