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J Neurophysiol 41: 260-267, 1978;
0022-3077/78 $5.00
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Journal of Neurophysiology, Vol 41, Issue 2 260-267, Copyright © 1978 by APS

ARTICLES

Cat hindlimb tactile dermatomes determined with single-unit recordings

P. B. Brown and H. R. Koerber

1. Single-unit recording from dorsal root ganglia was used to determine the dermatomes of L4-S2 segments in the cat. Dermatomes for low-threshold myelinated mechanoreceptor afferents are smaller than those reported in earlier studies of whole-root dermatomes. There are also sufficient discrepancies among earlier studies and with the present data to merit reexamination of hindlimb whole-root dermatomes. 2. Receptive-field size varies directly with distance from toes. Length/width ratio is essentially constant for different parts of the hindlimb. 3. Estimates of innervation density verify the long-standing assumption that innervation density is greater for foot and toes than for proximal hindlimb, at least for low-threshold cutaneous myelinated afferents.


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L. Wang, R. Millecchia, and P. B. Brown
Correlation of Peripheral Innervation Density and Dorsal Horn Map Scale
J Neurophysiol, August 1, 1997; 78(2): 689 - 702.
[Abstract] [Full Text] [PDF]


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