Mode of synaptic transmission between vestibular afferents and neurons of the vestibular nucleus in the frog |
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Authors: | A.L. Babalian A.I. Shapovalov |
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Affiliation: | Laboratory of Physiology of the Nerve Cell, Sechenov Institute, Academy of Sciences of the USSR, 194223 Leningrad U.S.S.R. |
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Abstract: | Excitatory postsynaptic potentials (EPSPs) were evoked in vestibular neurons of the isolated frog brainstem by stimulation of the ipsilateral vestibular nerve or by direct intra-axonal activation of single vestibular fibers. Composite as well as single-fiber EPSPs usually displayed two components. A Ca2+-deficient, Mn2+-containing solution abolished the delayed chemical components of the EPSPs, but did not affect the short latency responses suggesting a dual (electrical-chemical) mode of transmission between some vestibular afferents and vestibular neurons. |
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Keywords: | vestibular afferents vestibular neurons single-fiber EPSP electrical coupling electrical-chemical transmission |
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