THE PROCESSING OF MECHANOSENSORY INFORMATION BY SPIKING LOCAL INTERNEURONS IN THE LOCUST
THE PROCESSING OF MECHANOSENSORY INFORMATION BY SPIKING LOCAL INTERNEURONS IN THE LOCUST
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DOI：
10.1152/jn.1985.54.3.463
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发表时间：
1985-01-01
影响因子：
2.5
通讯作者：
BURROWS, M
中科院分区：
文献类型：
--
作者：
BURROWS, M
1. 通过对蝗虫后肢关节运动和刺激外部机械感受器时的细胞内记录，确定了蝗虫胸椎神经节中一组尖刺的局部中间神经元的反应和接受野。2. 一些中间神经元既响应来自特定关节的内部机械感受器（本体感受器）的输入，也响应来自一系列外部机械感受器的输入。这两种受体的作用可为兴奋性或抑制性。3. 其他中间神经元仅对本体感觉输入作出反应。有一系列的反应。一个极端是中间神经元，它们的反应是紧张性的，它们的脉冲频率是由特定关节的角度决定的。另一个极端是中间神经元，它们对关节向任何方向的强制运动做出物理反应。中间是中间神经元，它们对关节在一个方向上的位移做出快速或更慢的响应，以适应其峰值频率的变化。一个特定关节的每次运动都会刺激或抑制几个具有不同反应特征的中间神经元。中间神经元通常只接受来自一个关节的输入，尽管有些神经元同时受到股骨和胫骨受体的刺激。4. 中间神经元在单个运动神经元的直接刺激引起的腿部活动中，以及在身体其他部位的触觉刺激引起的运动中，会产生尖峰。
1. The responses and receptive fields of a group of spiking local interneurons in the metathoracic ganglion of the locust were defined by making intracellular recordings from them while moving joints of a hindleg and stimulating external mechanoreceptors. 2. Some interneurons respond both to inputs from internal mechanoreceptors (proprioceptors) at particular joints and to inputs from an array of external mechanoreceptors. The effects of both types of receptor can be excitatory or inhibitory. 3. Other interneurons respond to proprioceptive input alone. There is a spectrum of responses. At one extreme are interneurons that respond tonically, the frequency of their spikes being determined by the angle of a particular joint. At the other extreme are interneurons that respond phsically to imposed movements of a joint in any direction. Inbetween are interneurons that respond with either a rapidly or a more slowly adapting change in the frequency of their spikes to the displacement of a joint in only one direction. Each movement of a particular joint excites or inhibits several interneurons with a range of different response characteristics. An interneuron typically receives inputs from only one joint, though some are excited by both femoral and tibial receptors. 4. The interneurons spike during active movements of a leg elicited by direct stimulation of individual motor neurons, and during movements elicited by tactile stimulation of other parts of the body.