COMPREHENSIVE EVALUATION OF LEFT-HEMISPHERE TYPE-I SCHIZENCEPHALY

We report the neuropsychological, magnetic resonance imaging, electroe ncephalographic telemetry, and sodium amytal test findings of a 32-yea r-old, left-handed man with unilateral left hemisphere type I schizenc ephaly. The patient was referred for treatment of medically refractory left temporal complex partial seizures that developed at age 26 years . Sodium amytal testing revealed complete incorporation of speech and language function by the right hemisphere. Detailed neuropsychological evaluation indicated average to above-average performance on all meas ures of language skills, judgment and reasoning, visuospatial abilitie s, and memory function. This case demonstrates that extensive but late ralized neuronal migration disorders can be associated with complete r eorganization and full recovery of function by the contralateral hemis phere. Furthermore, this case supports the view that the degree of rec overy is greatest when compensatory mechanisms are activated antenatal ly.