Respiratory activities of intralaryngeal branches of the recurrent laryngeal nerve.
Respiratory activities of intralaryngeal branches of the recurrent laryngeal nerve.
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喉返神经喉内分支的呼吸活动。
DOI：
10.1152/jappl.1989.67.3.1171
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
BartlettJr,D
中科院分区：
文献类型：
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作者：
Zhou,D;Huang,Q;StJohn,WM;BartlettJr,D
为了区分运动神经活动注定声带外展肌和绑定的肌肉，内收的声带，我们记录了传出活动的喉返神经（RLN）在去脑，迷走神经切断，瘫痪，通气猫的喉内支。同时记录整个喉返神经和膈神经的活动。在几个稳态潮气末O2和CO2浓度下评估神经活动。甲杓肌（TA）的神经，声带内收肌，只有轻微的活动在基线（normocapnic，高氧）条件下，但在大多数猫发达国家在低碳酸血症或缺氧呼气期间的强烈活动。在严重的低碳酸血症，相呼气TA活动持续甚至在膈呼吸暂停，表明呼吸节律发生器的持续活动。环杓后肌（PCA）的神经，声带外展肌，总是活跃在吸气，但往往表现出呼气活动以及。这种呼气活动通常被高碳酸血症增强，常被缺氧抑制。这一结果与以前的肌电图结果一致，并强调了在喉控制研究中区分外展肌和内收肌活动的重要性。
To distinguish experimentally between motor nerve activity destined for vocal cord abductor muscles and that bound for muscles that adduct the cords, we recorded efferent activities of intralaryngeal branches of the recurrent laryngeal nerve (RLN) in decerebrate, vagotomized, paralyzed, ventilated cats. Activities of the whole RLN and phrenic nerve were also recorded. Nerve activities were assessed at several steady-state end-tidal O2 and CO2 concentrations. The nerve to the thyroarytenoid (TA) muscle, a vocal cord adductor, was only slightly active under base-line (normocapnic, hyperoxic) conditions but in most cats developed strong activity during expiration in hypocapnia or hypoxia. In severe hypocapnia, phasic expiratory TA activity persisted even during phrenic apnea, indicating continuing activity of the respiratory rhythm generator. The nerve to the posterior cricoarytenoid (PCA) muscle, the vocal cord abductor, was always active in inspiration but often showed expiratory activity as well. This expiratory activity was usually enhanced by hypercapnia and often inhibited by hypoxia. The results are consistent with previous electromyographic findings and emphasize the importance of distinguishing abductor from adductor activity in studies of laryngeal control.