Timing of knee-related spinal neurons during fictive rostral scratching in the turtle.
Timing of knee-related spinal neurons during fictive rostral scratching in the turtle.
复制标题
乌龟虚构的喙部抓挠过程中与膝盖相关的脊髓神经元的时间。
DOI：
10.1152/jn.00762.2003
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
Daniels-McQueen,Susan
中科院分区：
文献类型：
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作者：
Stein,PaulSG;Daniels-McQueen,Susan
膝关节屈肌运动活动与膝关节伸肌运动活动在脊椎龟的虚构吻侧抓挠期间有节奏地交替。在髋屈肌运动活动期间发生了从膝屈肌运动活动到膝伸肌运动活动的关键转变。这种转变的一个关键特征是，膝关节屈肌运动活动的结束阶段与膝关节伸肌运动活动的开始阶段呈正相关。我们研究了与这种过渡相关的活动的脊髓中间神经元。我们以前使用单单位记录技术的特点下降propriospinalinterneurons在嘴部抓挠的数据集。我们在这里集中研究了来自这个数据集的一组中间神经元，它们具有膝盖伸肌运动活动开始附近的开始阶段（开启单元）或结束阶段（关闭单元）。我们发现，对于这些单位的一个子集，开始时相ofon-units和结束时相ofofofoff-units正相关的膝盖伸肌运动活动的开始时相。我们提出了一个假设，即这些膝关节相关的上下单位中的一些可能在吻侧抓挠过程中对膝关节运动活动的计时起作用。
Knee-flexor motor activity rhythmically alternated with knee-extensor motor activity during fictive rostral scratching in the spinal turtle. A critical transition from knee-flexor motor activity to knee-extensor motor activity occurred during hip-flexor motor activity. A key feature of this transition was that the end-phases of knee-flexor motor activity were positively correlated with the start-phases of knee-extensor motor activity. We studied spinal interneurons with activities related to this transition. We previously used single-unit recording techniques to characterize a data set of descending propriospinal interneurons during rostral scratching. We focused here on a group of interneurons from this data set with start-phases (on-units) or with end-phases (off-units) near the start of knee-extensor motor activity. We showed that, for a subset of these units, the start-phases ofon-units and the end-phases ofoff-units were positively correlated with the start-phases of knee-extensor motor activity. We present the hypothesis that some of these knee-relatedon- andoff-units may play a role in timing knee motor activity during rostral scratching.