Convulsive mechanism elicited by closing of the eyes in a patient suffering from photosensitive petit mal and grand mal epilepsy

A. Balogh, P. Halasz, P. Rajna, I. Tomka

Research output: Contribution to journalArticle

Abstract

The authors examined the reflex pathways of the stimuli that elicit epileptic symptoms under predetermined conditions. After the patient had closed his eyes, very intense spike and wave, multiple spike and wave paroxysms appeared in the EEG synchronously and bilaterally that were inhibited immediately after the patient opened his eyes. Intermittent photic stimulation elicited consistently a photoconvulsive response. Closing of the eyes behind dark glasses likewise elicited spike and wave paroxysms. Bilateral lidocaine infiltration of the facial nerve interrupted the activation of the spike and wave bursts. Photic stimulation after lidocaine infiltration continued to be effective. The authors presume that, in addition to the photoconvulsive mechanism, superimposed, there is another sensorimotor reflex cycle that reinforces the epileptic mechanism. This originates from the proprioceptive impulses of flicker- and seizure-induced palpebral clonus. Most probably, conditioned factors also play an important role in their development.

Original languageEnglish
Pages (from-to)no. E 043
JournalElectroencephalography and Clinical Neurophysiology
Volume43
Issue number4
Publication statusPublished - Jan 1 1977

ASJC Scopus subject areas

  • Neuroscience(all)
  • Clinical Neurology

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