Physiology of peripheral neurons innervating semicircular canals of the squirrel monkey. 3. Variations among units in their discharge properties.
Physiology of peripheral neurons innervating semicircular canals of the squirrel monkey. 3. Variations among units in their discharge properties.
复制标题
松鼠猴半规管周围神经元的生理学。
DOI：
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发表时间：
1971
影响因子：
2.5
通讯作者：
C. Fernández
中科院分区：
文献类型：
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作者：
J. Goldberg;C. Fernández
WERSXLL（17）是第一个描述感觉表皮中发现的两种毛细胞，并证明它们具有不同的神经供应。I型毛细胞是鸟类和哺乳动物特有的，是一个相对较大的瓶状细胞，由来自单一的、通常较厚的传入纤维的萼状末端支配。II型毛细胞，在整个脊椎动物鳞片中很常见，薄而圆柱形。它接受来自几个传入的芽状末梢。Wersall的观察结果在Cajal（2，3）和Lorente de No（10）的经典银研究中有所预示，并在最近的超微结构（1，4，9，11，15，18）和光学显微镜研究（1，9）中得到充分证实。这些形态学的复杂性应反映在哺乳动物前庭传入的生理学。根据前两篇文章（6，s>），我们可以得出结论，支配哺乳动物半规管的神经元在放电特性上确实彼此不同。神经元在其动作电位间隔的规律性、其静息活动的水平、其对角加速度的敏感性以及其动态特性方面不同。如果这些差异反映了母体感觉轴突的神经支配模式的差异，则可能是由于神经元的神经元结构不同而引起的。
WERSXLL (17) was the first to describe the two kinds of hair cells found in the sensory epi thelium and to demonstrate that they had different nerve supplies. The type I hair cell, peculiar to birds and mammals, is a relatively large, flask-shaped cell and is innervated by a calycoid ending derived from a single, usually thick, afferent fiber. The type II hair cell, common throughout the vertebrate scale, is thin and cylindrically shaped. It receives bud-shaped endings from several afferents. Wersall’s observations were foreshadowed in the classical silver studies of Cajal (2, 3) and of Lorente de No (10) and have been amply confirmed in more recent ultrastructural (1, 4, 9, 11, 15, 18) and light microscopic studies (1, 9). These morphological complexi ties should be reflected in the physiology of mammalian vestibular afferents. On the basis of the two preceding papers (6, s>, it may be concluded that neurons innervating the semicircular canals of mammals do vary from one another in their discharge characteristics. Neurons differ in the regularity of spacing of their action potentials, in the level of their resting activity, in their sensitivity to angular accelerations, and in their dynamic properties. Were these differences a reflection of differences in the i nnerva tion patterns of the parent sensory axons, it might be ex-