上呼吸道的反射由于刺激下咽腔、喉和气管粘膜下的特殊感受器所引起。喉头插管、内腔镜检查、加压呼吸或头颈部手术时刺激这些感受器引起呼吸和循环反射性改变。下咽腔和喉的感受器由喉上神经支配。作者研究来自喉下神经纤维及其与喉上神经的吻合支。当各种不同的压力和气流刺激单根和多根神经标本,记录传人冲动发放适应率、阈值、自然发放频率、最大发放频率和适应率的变化。另外,研究在静止时自然呼吸下传入神经活 Upper respiratory tract reflex due to the stimulation of the pharynx, larynx and tracheal mucosal under the special susceptor caused. Throat intubation, endoscopy, pressure breathing or head and neck surgery to stimulate these receptors cause respiratory and circulatory reflex changes. The hypopharyngeal and throat receptors are dominated by the laryngeal nerve. The authors study the hypothyroid nerve fibers and their anastomosis branches with the laryngeal nerve. When a variety of different pressures and airflow stimulation of single and multiple nerve specimens, recorded impulse delivery adaptation rate, threshold, frequency of natural distribution, the maximum release frequency and adaptation rate changes. In addition, we study neural activity at natural breathing during rest