Differing control of neural activities during various portions of expiration in the cat.
Differing control of neural activities during various portions of expiration in the cat.
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猫在呼气的不同阶段对神经活动的控制不同。
DOI：
10.1113/jphysiol.1989.sp017834
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
D. Zhou
中科院分区：
文献类型：
--
作者：
W. M. S. John;D. Zhou
1.在去大脑、切断迷走神经、麻痹和通气的猫中记录膈神经、肋间神经和支配喉甲杓肌（TA）和胸壁胸骨三角肌（TS）的神经的活动。2.神经吸气由膈神经活动的相位来定义。神经呼气分为两个阶段，第一阶段对应于TA活动的持续时间，第二阶段对应于TS活动：肋间神经在两个阶段放电。3.膈神经活动提前终止的上级喉神经或脑桥的头侧背外侧区的电刺激。刺激后，神经活动在第一阶段的呼气上升，在第二阶段下降，在大多数动物。4.刺激的上级喉神经在第一阶段引起的TA和TS活动的增强。在刺激终止时，记录TA放电阶段，随后记录TS活动阶段。TA和TS活动的这些刺激后阶段的持续时间接近无刺激周期的持续时间。5.刺激的上级喉神经在第二阶段引起重置的神经呼气。刺激后，记录TA和TS活动的阶段，其持续时间接近无刺激周期的持续时间。6.刺激脑桥头侧的背外侧区域，诱导膈神经活动过早发作所需的电流随着呼气期从I期到II期的变化而急剧下降。7.我们的结论是，神经活动的控制显着不同的第一阶段和第二阶段的呼气。这些数据支持这一假设，即吸气后延髓呼吸神经元在呼吸周期的定义中起着重要作用。
1. Activities of the phrenic nerve, intercostal nerve and nerves innervating the thyroarytenoid (TA) muscle of the larynx and triangularis sterni (TS) muscle of the chest wall were recorded in decerebrate, vagotomized, paralysed and ventilated cats. 2. Neural inspiration was defined by the phase of phrenic activity. Neural expiration was divided into two phases with phase I corresponding to the duration of TA activity and phase II to TS activity: intercostal nerves discharged across both phases. 3. Phrenic activity was terminated prematurely by electrical stimulation of the superior laryngeal nerve or of the dorsolateral region of the rostral pons. Following stimulation, neural activities during phase I of expiration rose and those during phase II fell in most animals. 4. Stimulation of the superior laryngeal nerve during phase I caused augmentations of both TA and TS activity. At the termination of stimulation, a phase of TA discharge was recorded followed by a phase of TS activity. The durations of these post‐stimulation phases of TA and TS activities approximated those of cycles without stimulation. 5. Stimulation of the superior laryngeal nerve during phase II caused a resetting of neural expiration. Following stimulation, phases of TA and TS activity were recorded which had durations approximating those of cycles without stimulation. 6. The current required to induce a premature onset of phrenic activity by stimulation of the dorsolateral region of the rostral pons fell dramatically with the change from phase I to phase II of expiration. 7. We conclude that the control of neural activities differs markedly between phase I and phase II of expiration. The data support the hypothesis that post‐inspiratory medullary respiratory neurones play a fundamental role in the definition of the ventilatory cycle.
吸气中枢对腹部呼气神经活动的影响。
DOI：
10.1152/jappl.1988.65.4.1647
发表时间：
1988
期刊：
Journal of applied physiology (Bethesda, Md. : 1985)
影响因子：
--
作者：
Fregosi,RF;BartlettJr,D
通讯作者：
BartlettJr,D
DOI：
10.1152/jappl.1989.67.3.1171
发表时间：
1989
期刊：
Journal of applied physiology (Bethesda, Md. : 1985)
影响因子：
--
作者：
Zhou,D;Huang,Q;StJohn,WM;BartlettJr,D
通讯作者：
BartlettJr,D