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胼胝体神经元:它们之间的单突触连接及其下行投射

[Callosal neurons: monosynaptic connection between them and their descending projections].

作者信息

Ezrokhi V L, Tarasova L Iu, Aleksandrov L I

出版信息

Zh Vyssh Nerv Deiat Im I P Pavlova. 1985 May-Jun;35(3):528-36.

PMID:4036327
Abstract

Antidromic and monosynaptic unit responses to the stimulation of the corpus callosum and the symmetrical cortical area as well as antidromic responses to pyramidal tract and thalamic nuclei stimulation were recorded in the sensorimotor cortex of unanaesthetized rabbits. Out of 182 callosal neurones 13 exhibited transcallosal monosynaptic responses. 8 out of 56 callosal units responded antidromically to pyramidal tract or thalamic stimulation. Thus callosal neurones may be monosynaptically excited by callosal units via the corpus callosum and by the pyramidal tract units. It was also found that a pyramidal tract neurone may send a collateral through the corpus callosum and at the same time have a transcallosal monosynaptic input. The role of monosynaptic transcallosal excitation of callosal neurones is discussed.

摘要

在未麻醉的家兔感觉运动皮层中,记录了对胼胝体和对称皮质区域刺激的逆向和单突触单位反应,以及对锥体束和丘脑核刺激的逆向反应。在182个胼胝体神经元中,有13个表现出经胼胝体的单突触反应。在56个胼胝体单位中,有8个对锥体束或丘脑刺激产生逆向反应。因此,胼胝体神经元可能通过胼胝体被胼胝体单位单突触兴奋,也可能被锥体束单位单突触兴奋。还发现,一个锥体束神经元可能通过胼胝体发出一个侧支,同时有一个经胼胝体的单突触输入。讨论了胼胝体神经元单突触经胼胝体兴奋的作用。

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