作者用狗和猴作试验,研究呼吸辅助肌与呼吸的关系。狗试验时使处于浅麻醉状态,暴露胸骨舌骨肌和胸骨甲状肌,安装电极观察肌电图活动。结果:在动物血没有低氧和碳酸过多状态下,呼吸时可见胸骨甲状肌呈规则性收缩,但胸骨舌骨肌则为不规则轻微活动;在轻度低氧和碳酸过多时结果相似,胸骨甲状肌的兴奋与呼吸一致,胸骨舌骨肌为不规则活动;仅在严重低氧时才观察到胸骨舌骨肌有稍为规则的收缩。此外还发现,当颈部取过度伸展位时,胸骨舌骨肌则伴随呼吸而收缩。猴试验亦处于浅麻醉状态,同上观察肌电图活动。结果:平静呼吸时没有与呼吸一致的呼吸辅助肌活动;当诱发低氧和增加呼吸道阻力时,伴随呼吸发生肌肉活动,以肩胛舌骨肌最强,次 The authors used dogs and monkeys as a test to study the relationship between the breathing-assisted muscle and respiration. Dogs were tested in a shallow anesthetic state, exposing the sterno-hyoid muscle and sternothyroid muscle, installing electrodes to observe EMG activity. Results: Under the conditions of hypoxia and hypercholesterolaemia, the thymus thyroid muscle showed regular contraction while the sternohyoid muscle showed irregular minor activity. The results were similar in mild hypoxia and hypercholesterolemia, The excitability of the sternal thyroid muscle is consistent with the respiration, and the sternohyoid muscle is irregularly active; the sternohyoid muscle is observed to have a slightly regular contraction only in severe hypoxia. In addition, it was also found that the sternohyoid muscle constricts with breathing when the neck is over stretched. The monkey test was also in a shallow anesthetic state, as above, to observe EMG activity. Results: There was no respiration-assisted muscle activity during calm breathing. When hypoxia was induced and respiratory resistance was increased, muscle activity was accompanied by respiration,