Delayed transhemispheric propagation of electrographic seizures following functional hemispherectomy

Functional hemispherectomy is a procedure in which one cerebral hemisphere is functionally disconnected from the contralateral hemisphere by means of surgical disconnection of neuronal fibers between the hemispheres with preservation of frontal and occipital poles [1]. In hemimegalencephaly with pharmacoresistant epilepsy goal of such a procedure is to isolate seizures to the disconnected megalencephalic cerebral hemisphere and thus render seizures clinically silent.