GABAA receptors in the CNS mediate both fast synaptic and tonic inhibition. Over the past decade a phasic current with features intermediate between fast synaptic and tonic inhibition, termed GABAA,slow, has received increasing attention. This has coincided with an ever-growing appreciation for GABAergic cell type diversity. Compared with classical fast synaptic inhibition, GABAA,slow is slower by an order of magnitude. The speaker will summarize recent studies that have enhanced our understanding of GABAA,slow. These include the discovery of specialized interneuron types from which this current originates, the factors that could underlie its characteristically slow kinetics, its contribution to specific aspects of integrative function and network oscillations, and its potential usefulness as a novel drug target for modulating inhibitory synaptic transmission in the CNS.
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