Fig. 2From: Inhibitory or excitatory? Optogenetic interrogation of the functional roles of GABAergic interneurons in epileptogenesisEpileptogenesis via depletion of presynaptic neurotransmitter GABA. Postsynaptic principal cell firing is enhanced due to the depletion of the presynaptic GABA and release of inhibition. (−) inhibitoryBack to article page