Jackson described this form of seizure in 1863. It is associated with abnormal electrical activity that is localized to a single region of the brain.

Features of a Jacksonian seizure:

(1) simple partial seizure

(2) usually affects only one side of the body

(3) findings (abnormal movement, tingling, twitching, numbness) start in a small area, then spread ("march") to adjacent areas

(4) tend to be brief and the patient is alert during an episode.


Sometimes an abnormal movement may appear to be purposeful.


Risk factors:

(1) multiple sclerosis

(2) brain injury

(3) frontal lobe lesions

To read more or access our algorithms and calculators, please log in or register.