Photoparoxysmal responses

Arq Neuropsiquiatr. 1990 Sep;48(3):301-5. doi: 10.1590/s0004-282x1990000300006.


Sixty-five outpatients with photoparoxysmal response (PPR) during routine EEG were studied. The PPR showed prevalence in women (75.4%). Seizures were found in 66.1% of cases. The rest recordings were abnormal in 41.8% with prevalence of generalized paroxysm. Eight patterns of PPR were observed, being polyspike mixed to slow wave the most frequent (53%). The epileptic group showed a bimodal distribution in the several bands of photic stimulation, near 8 and 20-24 Hz. A sustained paroxysmal abnormality persisting after the photic stimulation was present in 6 epileptic patients.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Child
  • Child, Preschool
  • Electroencephalography*
  • Epilepsy / physiopathology*
  • Female
  • Humans
  • Infant
  • Male
  • Middle Aged
  • Photic Stimulation*
  • Sex Factors