...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Neurophysiology >Physiological signs of the activation of bag2 and chain intrafusal muscle fibers of gastrocnemius muscle spindles in the cat.
【24h】

Physiological signs of the activation of bag2 and chain intrafusal muscle fibers of gastrocnemius muscle spindles in the cat.

机译：猫中腓肠肌梭形的bag2和融合肌内纤维的激活的生理信号。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A method is described for identifying the effect of single gamma static (gamma(s)) axons on bag2 or chain intrafusal fibers using random (Poisson-distributed) stimuli. The cross-correlogram of the stimuli with the firing of spindle primary afferents took one of three forms. A large, simple, brief response was taken to indicate pure chain fiber activation and a small, prolonged response to indicate pure bag2 activation. A compound response with brief and prolonged components was taken to be a sign of mixed innervation. The correlogram components could be well fitted with lognormal curves. They could also be transformed into curves of gain as a function of frequency, which were convenient for estimating the strength of the effects. In 68 effects of gammas axons on Ia afferents, 16 were pure chain, 17 pure bag2, and 35 mixed. This distribution was significantly different (P < 0. 05) from that expected from chance nonspecific innervation of chain and bag2 fibers. Making use of the estimates of the strength of chain and bag2 effects derived from the gain curves, the classification was modified by treating mixed responses that had one effect more than five times stronger than the other as belonging to the dominant type. The distribution was then as follows: chain 16, bag2 28, and mixed 24. This differed very significantly from the prediction of chance distribution (P < 0.001). This evidence for some degree of specific innervation of chain and bag2 fibers is discussed in relation to previous work and with regard to the ways in which the two fiber types might be used in natural movements.
机译：描述了一种使用随机（泊松分布）刺激识别单个伽玛静态（gamma）轴突对bag2或链状融合纤维的影响的方法。刺激与心轴初级传入刺激的交叉相关图采用以下三种形式之一。大，简单，简短的响应表示纯链纤维激活，而小而长时间的响应表示纯bag2激活。具有短暂和延长成分的复合反应被认为是混合神经支配的迹象。相关图组件可以很好地拟合对数正态曲线。它们也可以转换为增益随频率变化的曲线，这对于估算效果的强度很方便。在68个伽玛轴突对Ia传入的影响中，有16个是纯链，有17个是纯bag2，有35个是混合的。该分布与链和bag2纤维的偶然非特异性神经支配所预期的分布显着不同（P <0. 05）。利用从增益曲线得出的链和bag2效应强度的估计，通过将一种效应比另一种效应强五倍于另一种效应属于显性类型，来修改分类。分布如下：链16，bag2 28和混合24。这与机会分布的预测有很大差异（P <0.001）。关于链纤维和bag2纤维在某种程度上特定神经支配的证据，已与先前的工作以及两种纤维在自然运动中的使用方式进行了讨论。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号