Mystery case: a young boy with myoclonic jerks.

A 16-year-old right-handed boy presented for consultation for recent development of seizures. He is the product of a normal pregnancy and delivery without a history of developmental delay, head trauma, or family history of epilepsy. A year and a half prior to our consultation, the patient noted that his hand would suddenly jerk across the page while writing in his morning classes. Stress would exacerbate the jerks. Six months later, after staying up late the previous night, the patient awoke early and began to play on the computer when both of his hands suddenly jerked multiple times. He then fell over and began seizing. His mother witnessed tonic contraction of his body followed by clonic activity. He was brought by ambulance to the nearest hospital where a CT head was reported normal.