Abstract

Inhibition in neurons of the lizard olfactory bulb was investigated by intracellular recording. The hyperpolarization arising in the neurons after the spike in the response to orthodromic and antidromic activation is similar in composition and reflects the development of early and late IPSPs, differing from one another in latency, duration, and mechanism of generation. The early IPSP is evidently generated by the functioning of dendrodendritic synapses, formed by dendrites of the interglomerular cell on the membrane of the apical dendrites of the secondary neurons, whereas synapses generating the late IPSP are located on the basal dendrites and are formed by endings of the granular cells. The mechanisms of generation of the early and late IPSPs in the secondary neurons are discussed. A classification of neurons of the lizard olfactory bulb is given on the basis of analysis of their intracellular activity.

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