Turnbull B G, Rasmusson D D
Department of Physiology and Biophysics, Dalhousie University, Halifax, Nova Scotia, Canada.
Somatosens Res. 1987;5(1):19-33. doi: 10.3109/07367228709144616.
This report summarizes single-fiber and multifiber data from the median, ulnar, dorsal ulnar, and superficial radial nerves innervating the raccoon forepaw with respect to the cutaneous domains innervated by each nerve. The median nerve was found to innervate the ventral surface of the first four digits and the radial two-thirds of the palm. Its innervation extended onto digit 5 in some animals. The palmar branch of the ulnar nerve innervated digits 4 and 5 and the ulnar half of the palm. The superficial radial nerve innervated the dorsal surface of the first four digits and the radial two-thirds of the forepaw, whereas the dorsal branch of the ulnar nerve innervated the ulnar half of the paw and digits 4 and 5. Overlap of adjacent nerves was verified in several cases by recording from two nerves in the same animal. The domains of the ventral and dorsal nerves overlapped at the borders of glabrous and hairy skin, particularly around the claws. Fiber types were not strictly grouped within particular fascicles according to either spatial or functional characteristics. However, there was a tendency toward overrepresentation of different modality and submodality types in different fascicles. The relevance of the overlap zones and autonomous zones of these nerves to experiments on central effects of peripheral nerve injury is discussed.
本报告总结了支配浣熊前爪的正中神经、尺神经、尺背神经和桡浅神经的单纤维和多纤维数据，涉及每条神经所支配的皮肤区域。发现正中神经支配前四个手指的腹面以及手掌桡侧的三分之二。在一些动物中，其支配范围延伸到了第5指。尺神经的掌支支配第4指和第5指以及手掌尺侧的一半。桡浅神经支配前四个手指的背面以及前爪桡侧的三分之二，而尺神经的背支支配爪子尺侧的一半以及第4指和第5指。在同一动物的两条神经上进行记录，在几种情况下证实了相邻神经的重叠。腹侧和背侧神经的区域在无毛皮肤和有毛皮肤的边界处重叠，尤其是在爪子周围。纤维类型并未根据空间或功能特征严格地聚集在特定的束内。然而，在不同的束中，不同模态和亚模态类型有过度代表的趋势。讨论了这些神经的重叠区和自主区与周围神经损伤的中枢效应实验的相关性。
