Identification of head motions by central vestibular neurons receiving linear and angular input.
Identification of head motions by central vestibular neurons receiving linear and angular input.
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通过接收线性和角度输入的中央前庭神经元识别头部运动。
DOI：
10.1007/s004220050554
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
Boyle,R
中科院分区：
文献类型：
--
作者：
Holly,JE;McCollum,G;Boyle,R
大多数自然发生的头部在空间中的位移，要么是由于身体的外部扰动，要么是由于自我产生的、自愿的头部运动，对头部施加了线性和角向力。前庭系统分别检测头部的线加速和角加速，但随后对凝视和姿势的控制往往依赖于对线运动和角运动信息的联合处理。因此，次级神经元的输出可以反映头部运动的线性分量、角度分量或两者。虽然前庭系统通常是根据对头部线性和角加速度的不同反应来研究的，但事实上，前庭系统中的许多二级和高阶神经元确实从这两组运动传感器接收信息。本文发展了分析接收两种类型信息的神经元的响应的方法，重点研究了由线性分量和角分量组成的正弦运动的响应。我们发现，每个神经元都有一个首选的运动，但单个神经元不能对单个运动进行编码。然而，一对神经元可以通过放电频率调制的相对阶段来编码一个动作。通过这种方式，神经元结合了关于直线运动和角运动的信息，从而增强了关于运动的信息。
Most naturally occurring displacements of the head in space, due to either an external perturbation of the body or a self-generated, volitional head movement, apply both linear and angular forces to the head. The vestibular system detects linear and angular accelerations of the head separately, but the succeeding control of gaze and posture often relies upon the combined processing of linear and angular motion information. Thus, the output of a secondary neuron may reflect the linear, the angular, or both components of the head motion. Although the vestibular system is typically studied in terms of separate responses to linear and angular acceleration of the head, many secondary and higher-order neurons in the vestibular system do, in fact, receive information from both sets of motion sensors. The present paper develops methods to analyze responses of neurons that receive both types of information, and focuses on responses to sinusoidal motions composed of a linear and an angular component. We show that each neuron has a preferred motion, but a single neuron cannot code for a single motion. However, a pair of neurons can code for a motion by the relative phases of firing-rate modulation. In this way, information about motion is enhanced by neurons combining information about linear and angular motion.