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首页> 外文期刊>Journal of Neurophysiology >Ventral respiratory group bulbospinal inspiratory neurons participate in vestibular-respiratory reflexes.
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Ventral respiratory group bulbospinal inspiratory neurons participate in vestibular-respiratory reflexes.

机译：腹侧呼吸组球根上吸神经元参与前庭呼吸反射。

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1. The vestibular system responds to accelerations of the head and produces reflex responses that serve a variety of compensatory functions. The neuronal circuitry that mediates vestibulo-respiratory reflexes is largely unknown. The purpose of the present study was to investigate the possible role of bulbospinal inspiratory neurons located in the para-ambigual region of the ventral respiratory group (VRG) in mediating these reflexes. Experiments were carried out in cats that were decerebrated, paralyzed, and artificially ventilated. 2. Activation of the vestibular nerve by electrical stimulation produced prominent bilateral reflex responses recorded from the phrenic nerve, which supplies the diaphragm. The responses could be complex and consisted of a decrease and/or increase in nerve discharge. 3. Extracellular recordings were made from 35 VRG inspiratory neurons that were antidromically activated from the upper cervical spinal cord. Almost one-half of these neurons (15/35, 43%) responded to vestibular stimulation. The neuronal response patterns were consistent with VRG inspiratory neurons contributing to the vestibular reflex response simultaneously recorded from the phrenic nerve. 4. The present results indicate that approximately one-half of VRG bulbospinal inspiratory neurons contribute to vestibulo-respiratory reflexes. These findings are in contrast to our recent neuroanatomic and electrophysiological studies which revealed a paucity of vestibular inputs to the dorsal respiratory group (DRG) located in the ventrolateral nucleus of the solitary tract. Thus there appears to be a difference between inspiratory neurons in the DRG and VRG in regard to participating in vestibulo-respiratory reflexes.
机译：1.前庭系统对头部的加速度作出反应，并产生反射反应，可起到多种补偿功能。介导前庭呼吸反射的神经元电路很大程度上是未知的。本研究的目的是调查位于腹侧呼吸组（VRG）的歧义旁区域的球颈吸气神经元在介导这些反射中的可能作用。实验是在去脑，瘫痪和人工通风的猫中进行的。 2.通过电刺激激活前庭神经产生了supplies神经记录的明显的双侧反射反应，supplies神经供应the肌。反应可能很复杂，包括神经放电的减少和/或增加。 3.从35个VRG吸气神经元进行细胞外记录，这些VRG吸气神经元从上颈脊髓被抗激活。这些神经元中几乎有一半（15 / 35，43％）对前庭刺激有反应。神经元反应模式与VRG吸气神经元一致，VRG吸气神经元同时从nerve神经记录了有助于前庭反射反应的信息。 4.目前的结果表明，约有一半的VRG球胸椎吸气神经元有助于前庭呼吸反射。这些发现与我们最近的神经解剖学和电生理学研究相反，后者的研究表明位于前庭腹侧核的背侧呼吸组（DRG）的前庭输入很少。因此，就参与前庭呼吸反射而言，DRG和VRG中的吸气神经元之间似乎存在差异。

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