Structures in sensory region of snake spindles and their displacment during stretch.
Structures in sensory region of snake spindles and their displacment during stretch.
复制标题
蛇纺锤体感觉区的结构及其在拉伸过程中的位移。
DOI：
10.1152/jn.1977.40.5.1121
复制
发表时间：
1977
影响因子：
2.5
通讯作者：
C. Hunt
中科院分区：
文献类型：
--
作者：
Y. Fukami;C. Hunt
1. 使用微分干涉显微镜观察短囊和长囊蛇肌梭感觉区域内的结构。用诺马斯基显微镜观察到的轮廓已通过电子显微镜对相同制剂进行了鉴定。 2. 在活体标本中可以看到感觉神经末梢、细胞核和梭内纤维、胶原带和囊细胞中的其他细胞质内含物。 3. 使用高速电影显微摄影技术测量了感觉区域内各种元件随纺锤体拉伸而发生的长度变化。这与短胶囊纺锤体和长胶囊纺锤体的感觉末端的脉冲响应相关。 4. 具有高动态灵敏度的短胶囊纺锤体在响应斜坡和保持拉伸时显示感觉区域的长度变化，这与脉冲频率的变化不平行。讨论了主轴行为机械模型的含义。
1. Structures within the sensory region of short- and long-capsule snake muscle spindles have been visualized using differential interference contrast microscopy. Profiles seen with Nomarski microscopy have been identified by electron microscopy of the same preparations. 2. Sensory nerve terminals, nuclei and other cytoplasmic inclusions in the intrafusal fiber, collagen bands, and capsular cells may be seen in the living preparation. 3. The length changes of various elements within the sensory region in response to stretch of the spindle have been measured using high-speed ciné photomicrography. This has been corrleated with the impulse response from sensory endings in short-and long-capsule spindles. 4. Short-capsule spindles, which have a high dynamic sensitivity, show length changes in the sensory region in response to ramp-and-hold stretch, which are not parallel to the changes in impulse frequency. The implications for mechanical models of spindle behavior are discussed.