PMID: 6160215Jan 1, 1980Paper

Electroencephalographic and behavioural effects of sodium valproate in patients with photosensitive epilepsy. A single dose trial

Journal of Neurology
M S MyslobodskyR Douglas

Abstract

A single oral dose of Sodium valproate (VPA) given as Epilim (10 mg/kg) inhibited photoconvulsive responses, especially to 15--30 Hz frequency flicker, in seven out of ten patients with photosensitive epilepsy. In addition, in all patients (with an exception of one) the amplitude of the secondary slow negative wave of the visual evoked potentials was reduced 4--5 h after drug administration. However, in five of these patients the normalization of electrocortical reactions to a single flash and flickering light was accompanied by somnolence and fatigue, moderate slowing of EEG background, development of 3 Hz spike-wave activity and (in three patients) augmented response to hyperventilation. In two patients the EEG photoconvulsive discharge was exaggerated by VPA. There VPA effects suggest that photosensitivity and the underlying epileptic condition have overlapping albeit different pathophysiology. The data offer no support for the conclusion that reduced photosensitivity produced by VPA is associated with the therapeutic potency of the drug.

References

Jul 1, 1976·Electroencephalography and Clinical Neurophysiology·B L Ehrenberg, J K Penry
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Nov 1, 1979·The Canadian Journal of Neurological Sciences. Le Journal Canadien Des Sciences Neurologiques·A N NeophytidesD B Calne
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Jun 1, 1979·Biochemical Pharmacology·B W Metcalf
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Sep 1, 1979·Pharmacology, Biochemistry, and Behavior·M S MyslobodskyJ Engel
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Apr 1, 1980·Epilepsia·M S Myslobodsky, E S Valenstein

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Citations

Dec 1, 1981·Electroencephalography and Clinical Neurophysiology·M MintzM S Myslobodsky
May 1, 1994·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·G Harding
Sep 12, 2003·Seizure : the Journal of the British Epilepsy Association·J VijaiK Radhakrishnan
Jun 1, 1988·The Japanese Journal of Psychiatry and Neurology·Y WadaN Yamaguchi
Mar 1, 2012·Epilepsy & Behavior : E&B·Pramod KrishnanParthasarathy Satishchandra

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