Somal action potential duration differs in identified primary afferents.

R D Rose; H R Koerber; M J Sedivec; L M Mendell

doi:10.1016/0304-3940(86)90366-6

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Somal action potential duration differs in identified primary afferents.

R D Rose·H R Koerber·M J Sedivec·L M Mendell

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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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Action Potentials Animals Cats Ganglia, Spinal Nerve Fibers Neural Conduction Neurons, Afferent Reaction Time Sensory Receptor Cells Skin Time Factors Journal Article Research Support, U.S. Gov't, P.H.S.

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R D Rose, H R Koerber, M J Sedivec, L M Mendell. 1986-01-30. Somal action potential duration differs in identified primary afferents.. https://doi.org/10.1016/0304-3940(86)90366-6

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