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[猫丘脑后外侧核在传导外周和皮层多感觉影响中的作用]

[Role of the posterolateral nucleus of the cat thalamus in conducting peripheral and cortical polysensory influences].

作者信息

Poliakova A G

出版信息

Zh Vyssh Nerv Deiat Im I P Pavlova. 1977 Sep-Oct;27(5):1049-60.

PMID:930401
Abstract

The posterior lateral thalamic nucleus (LP) of the cat has separate inputs for ascending signals of different sensory and subcortical origin, as well as for cortifugal activity. With somatic stimuli, only non-specific and reticular signals come to LP. They are not directly involved in the genesis of evoked potentials (EP) in the parietal cortex (P) and the somatic zones I and II (SI and SII). With visual stimuli, specific and reticular impulses directly concerned with the formation of visual EPs in the P and the visual zone (VI) are projected to LP. The cortifugal action of VI, SI and SII influences the same modality in LP. The descending effect of P on visual and somatic signals in LP is actieved along autonomous pathways and consists in dissimilar types of direct (as in VI) and indirect (as in SI and SII) descending influences of different projection zones on impulses of the same modality in the given nucleus.

摘要

猫的丘脑后外侧核(LP)对于源自不同感觉和皮质下结构的上行信号以及离心活动具有独立的输入。对于躯体刺激,仅有非特异性和网状信号传入LP。它们并不直接参与顶叶皮质(P)以及躯体I区和II区(SI和SII)诱发电位(EP)的产生。对于视觉刺激,与P区和视觉区(VI)视觉EP形成直接相关的特异性和网状冲动投射至LP。VI、SI和SII的离心作用影响LP中的相同感觉模态。P区对LP中视觉和躯体信号的下行作用通过自主通路实现,并且由不同投射区对给定核团中相同感觉模态冲动的不同类型直接(如VI区)和间接(如SI和SII区)下行影响组成。

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1
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Zh Vyssh Nerv Deiat Im I P Pavlova. 1977 Sep-Oct;27(5):1049-60.
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