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猕猴弓状周围神经元的传入特性。I. 躯体感觉反应。

Afferent properties of periarcuate neurons in macaque monkeys. I. Somatosensory responses.

作者信息

Rizzolatti G, Scandolara C, Matelli M, Gentilucci M

出版信息

Behav Brain Res. 1981 Mar;2(2):125-46. doi: 10.1016/0166-4328(81)90052-8.

Abstract

The afferent properties of single neurons of the periarcuate cortex have been studied in the macaque monkey. Most of the recorded neurons responded to stimuli in one or two sensory modalities and, accordingly, they were classified as somatosensory, visual or bimodal (visual and somatosensory) neurons. Visual neurons were located rostral to the arcuate sulcus, whereas the somatosensory and the bimodal neurons were found predominantly caudal to this sulcus. Somatosensory neurons (n = 102) and bimodal neurons (n = 69) had identical somatic afferent properties. They were subdivided into 'tactile' neurons, 'joint' neurons and 'tactile and joint' neurons. 'Tactile' neurons (70%) had their receptive fields formed either by one or by two or more spatially separated responding areas. The parts of the body most represented were the hands and the mouth. 'Joint' neurons (10%) were activated by the rotation of one or, more often, of two or more articulations. The movement of the hand towards the mouth was the most frequently represented movement. 'Tactile and joint' neurons (20%) responded to both tactile and joint stimulation having receptive field locations and properties like those of the other two classes of neurons. Some 'joint' and 'tactile and joint' neurons had summing properties, i.e. their response to tactile or joint stimulation was conditional upon a simultaneous stimulation of another articulation. The data are interpreted as evidence in favor of the existence of an area in the agranular cortex that organizes the mouth and the hand to mouth movements.

摘要

在猕猴身上研究了弓状沟周围皮质单个神经元的传入特性。大多数记录到的神经元对一两种感觉模态的刺激有反应,因此,它们被分类为体感神经元、视觉神经元或双峰神经元(视觉和体感)。视觉神经元位于弓状沟前方,而体感神经元和双峰神经元主要位于该沟后方。体感神经元(n = 102)和双峰神经元(n = 69)具有相同的躯体传入特性。它们被细分为“触觉”神经元、“关节”神经元和“触觉和关节”神经元。“触觉”神经元(70%)的感受野由一个或两个或更多空间上分离的反应区域形成。身体中表征最多的部位是手和嘴。“关节”神经元(10%)通过一个关节或更常见的两个或更多关节的旋转而被激活。手向嘴的运动是最常表征的运动。“触觉和关节”神经元(20%)对触觉和关节刺激都有反应,其感受野位置和特性与其他两类神经元相似。一些“关节”和“触觉和关节”神经元具有总和特性,即它们对触觉或关节刺激的反应取决于同时对另一个关节的刺激。这些数据被解释为支持在无颗粒皮质中存在一个组织嘴和手到嘴运动的区域的证据。

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