Neuronal activity that originates from both hemispheres is called

• A. Generalized onset seizure
• B. Focal onset seizure
• C. Absence seizure
• D. Myoclonic seizure

Answer: (A)

Generalized onset seizures are defined by neuronal activity that starts in both hemispheres from the outset, or rapidly engages bilateral brain networks. This bilateral origin produces widespread, often symmetric clinical features and commonly involves loss of consciousness. In contrast, focal onset seizures begin in a single area of the brain and may spread. So the phrase describes a generalized onset pattern, distinguishing it from localized (focal) onset.