供应猴子食指无毛皮肤的机械感受纤维的神经支配密度。
Innervation density of mechanoreceptive fibres supplying glabrous skin of the monkey's index finger.
作者信息
Darian-Smith I, Kenins P
出版信息
J Physiol. 1980 Dec;309:147-55. doi: 10.1113/jphysiol.1980.sp013500.
Abstract
- The innervation densities of mechanoreceptive fibres supplying the ridged glabrous skin of the middle and terminal phalanges of the monkey's (Macaca nemestrina) index finger were estimated using a combination of histological and neurophysiological procedures. 2. This estimate was based on (a) a count of the total number of A beta myelinated fibres in the palmar digital nerve at the level of the proximal phalanx, (b) the demonstration that the majority of A beta fibres in the monkey's palmar digital nerve are mechanoreceptive afferents, (c) the estimation, based on a sample of 398 fibres, of the fractions of rapidly adapting, slowly adapting and Pacinian mechanoreceptive fibres in the palmar digital nerve, and (d) the estimation of the area of glabrous skin innervated by the palmar digital nerve. 3. The estimated innervation density of the finger pad and the skin of the middle phalanx were: rapidly adapting fibres, 178 and 80/cm2; slowly adapting fibres, 134 and 46/cm2; and Pacinian fibres, 13/cm2 for both phalanges.
摘要
- 运用组织学和神经生理学相结合的方法，估算了供应猕猴（食蟹猴）食指中节和末节指骨有脊无毛皮肤的机械感受器纤维的神经支配密度。2. 该估算基于以下几点：(a) 近端指骨水平掌侧指神经中 Aβ 有髓纤维总数的计数；(b) 证明猕猴掌侧指神经中的大多数 Aβ 纤维是机械感受器传入纤维；(c) 基于 398 根纤维的样本，估算掌侧指神经中快速适应、缓慢适应和帕西尼机械感受器纤维的比例；(d) 估算掌侧指神经所支配的无毛皮肤面积。3. 指腹和中节指骨皮肤的估算神经支配密度分别为：快速适应纤维，178 和 80/平方厘米；缓慢适应纤维，134 和 46/平方厘米；两个指节的帕西尼纤维均为 13/平方厘米。
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