Spreading depression enhances the spontaneous epileptiform activity in human neocortical tissues.
Spreading depression (SD) is a well-known phenomenon in animal models of experimental epilepsy. However, the interaction of SD with epileptiform activity in human neuronal tissues is not clear. The aim of the present study was to investigate the effect of SD on synchronous rhythmic sharp field potentials in human neocortical slices. Spreading depression was elicited in human neocortical slices that exhibited sharp potentials. Extracellular field potentials were recorded from the third and fifth layers. SD significantly enhanced the repetition rate and amplitude of spontaneous rhythmic potentials in all tested slices. The results indicate that SD may facilitate the synchronization of different foci of rhythmic sharp field potentials and increase the excitability in human brain tissue.
Gorji
Ali
A
Institut für Physiologie, Universität Münster, Robert-Koch-Strasse 27a, 48149 Muenster, Germany. gorjial@uni-muenster.de
Speckmann
Erwin-Josef
EJ
D000200:Action Potentials / Q000502:physiology; D000293:Adolescent; D000328:Adult; D002675:Child, Preschool; D013181:Cortical Spreading Depression; D003344:Cortical Synchronization; D004827:Epilepsy / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D019579:Neocortex / Q000502:physiology*; D009924:Organ Culture Techniques