Epilepsy
Epilepsy is a central nervous system disorder in which brain activity is altered causing epileptic seizures or periods of abnormal behavior and unconsciousness. Causes of epilepsy include problems in the brain such as a head injury, serious brain trauma, a stroke or toxic ingestion. For the question given above, it is most likely that Jackson had epilepsy because his corpus callosum which is a part of the brain was severed.