Table 1: Incidence of photoparoxysmal response to photic stimulation: patients with isolated seizures. Adults: those who had EEG records at the age of 18 years and above [19 years to 84 years]. Children: those who had EEG records before the age of 18 years [6 months to 17 years].

NumberNumber with PPD%

All patients137139.5
Males78911.5
Females5946.8
Adults7345.47
Children64914.06
Patients with:
Generalized seizure:
 Tonic-clonic631015.9
 Tonic6
 Absence 7
 Atonic3
 Myoclonic2
 Clonic1
Focal seizure (simple):
 Occipital1
 Temporal1
 Frontal2
Secondarily generalized seizure 2
Indetermined semiology4436.8
Spasms1

Photoparoxysmal discharges, PPD in children > adults, PPD in males > females, and PPR IV > PPR III.