Photogenic Epilepsy: Parameters of Activation

AS MUCH of the recent investigation into the field of activation of the electroencephalogram by intermittent photic stimulation has been of purely scientific nature, 1 an account of a more practical application of the technique to the clinical problems of epilepsy seems appropriate. REPORT OF CASE History. —J. G. a white farmer aged 31, since the age of 10 years had suffered from major convulsive seizures; these had gradually increased in severity and frequency until they numbered 10 to 12 a year. The patient had noted no aura or warning while he was conscious. The attacks, all preceded by exposure to bright or flickering light, consisted of a sudden loss of consciousness without warning, falling to the ground, and rolling up of the eyes, followed by generalized tonic and clonic convulsions. The average duration of such a seizure was 15 to 20 minutes. During seizures the patient had bitten his