Presynaptic Depolarization Mediates Presynaptic Inhibition at a Synapse between an Identified Mechanosensory Neurone and Giant Interneurone 3 in the First Instar Cockroach, Periplaneta Americana
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چکیده
Intracellular microelectrodes were used to study presynaptic inhibition at a cholinergic synapse between identified neurones: the lateral filiform hair sensory neurone (LFHSN) and giant interneurone 3 (GI 3) in the terminal ganglion of the first instar cockroach Periplaneta americana. The LFHSN-GI3 synapse was shown to fulfil physiological criteria for monosynaptic transmission: the latency of the EPSPs was l"4ms and was constant during high-frequency firing of LFHSN; transmission was progressively and reversibly abolished by replacement of Ca with
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