Spontaneous and reflexly evoked laryngeal abductor and adductor muscle activity of cat.
Spontaneous and reflexly evoked laryngeal abductor and adductor muscle activity of cat.
复制标题
猫的自发和反射诱发的喉外展肌和内收肌活动。
DOI：
10.1016/0014-4886(74)90189-7
复制
发表时间：
1974
影响因子：
5.3
通讯作者：
D. Megirian
中科院分区：
文献类型：
--
作者：
J. Sherrey;D. Megirian
在用氯醛糖尿烷麻醉或去大脑并补充盐酸氯胺酮的猫中，对喉展肌（环杓后肌）和内收肌（甲杓肌和环杓外侧肌）的自发和反射诱发活动进行了研究。环杓后肌在吸气时很大程度上是活跃的，但在整个呼吸周期中表现出紧张性活动;甲杓肌和环杓外侧肌在呼气时有节奏地活跃。麻醉量的戊巴比妥取消了内收肌的节律性，并增强了外展肌的周期性吸气活动。过度换气增加了紧张性内收肌活动，而在呼吸暂停消退前减少了外展肌活动。刺激舌咽神经（咽上分支）和上级喉神经，吸气时主要引起内收肌的兴奋性反应，外展肌的兴奋性反应较大，但有减弱的趋势。刺激尾侧肋间神经引起类似的效果，但程度较低。吸气期间的外周膈神经刺激促进了反射性外展肌活动，而呼气期间的这种刺激促进了反射性内收肌活动。集体证据进一步支持了喉具有双重功能的结论：呼吸器官（吸气时声门扩大，呼气时声门缩小）和下呼吸道的监护人（收缩内收肌和放松外展肌的反射性括约肌作用）。
A study of spontaneous and reflexly evoked activity of laryngeal abductor (posterior cricoarytenoid) and adductor (thyroarytenoid and lateral cricoarytenoid) muscles was carried out in cats anesthetized with chloraloseurethane or made decerebrate and supplemented with ketamine HCl. The posterior cricoarytenoid muscle was active largely during inspiration but showed tonic activity throughout the respiratory cycle; the thyroarytenoid and lateral cricoarytenoid muscles were rhythmically active during expiration. Anesthetic amounts of pentobarbital abolished adductor rhythmicity and enhanced cyclic inspiratory activity of the abductor muscle. Hyperventilation increased the tonic adductor muscle activity while diminishing abductor muscle activity prior to resolution of apnea. Glossopharyngeal (epipharyngeal branch) and superior laryngeal nerve stimulation evoked chiefly excitatory effects on adductors and largely and attenuating effect on the abductor during inspiration. Stimulation of caudal intercostal nerves caused similar effects but to a lesser degree. Peripheral phrenic nerve stimulation during inspiration facilitated reflex abductor muscle activity whereas such stimulation during expiration facilitated reflex adductor muscle activity. The collective evidence further supports the conclusion that the larynx has a dual function: that of a respiratory organ (widening of the glottis during inspiration and its narrowing during expiration) and of a guardian of the lower respiratory tract from invading foreign matter (reflex sphincter action of contracting adductor muscles with relaxation of the abductor).