Elsevier

Neuroscience Letters

Volume 63, Issue 3, 30 January 1986, Pages 259-264
Neuroscience Letters

Somal action potential duration differs in identified primary afferents

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Abstract

In the present study we examined action potentials recorded from somata in the cat L7 and S1 dorsal root ganglia. We found (i) that there is a characteristic spike duration for each receptor type (e.g. Golgi tendon organ, D-hair) and (ii) that, for a given peripheral fiber conduction velocity, somata whose axons supply low-threshold cutaneous receptors exhibit spikes with shorter durations than those innervating high-threshold cutaneous receptors. These results suggest that there may be significant differences in somal membrane composition which are specific to the physiological receptor types innervated.

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  • Cited by (0)

    ∗∗

    Present address: Department of Biology, Appalachian State University, Boone, NC 28608, U.S.A.

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