Homma I
Respir Physiol. 1980 Mar;39(3):345-53. doi: 10.1016/0034-5687(80)90065-1.
The effects of chest wall vibrations on tidal volume (VT), inspiratory time (TI) and expiratory time (TE) were measured in normal man during rebreathing. Two vibrators, frequency 100 HZ, were applied bilaterally over the 7th to 10th intercostal spaces anterior to the mid-axillary line. The vibrators were triggered by chest wall movement during the inspiratory phase once or twice, intermittently, every 4-10 breaths. The VT and TI of "vibrated" breaths were decreased compared with preceding control breaths. These effects were clearly paralleled by a reduction in averaged integrated EMG recordings from the diaphragm. The initial time course of the integrated EMG activities in vibrated and non-vibrated breaths were almost equal. However, the relationship between VT and TI of vibrated breaths was shifted downward from that of the non-vibrated (control) breaths. The depression of VT was augmented as the VT of control breath increased. The findings suggest that supraspinal intercostal inhibitory reflex normally contributes to the phase switching mechanism of respiration in man.
在正常男性重复呼吸过程中，测量胸壁振动对潮气量（VT）、吸气时间（TI）和呼气时间（TE）的影响。两个频率为100赫兹的振动器双侧置于腋中线前第7至第10肋间。振动器在吸气相由胸壁运动触发，每4 - 10次呼吸间歇性触发一次或两次。与之前的对照呼吸相比，“振动”呼吸的VT和TI降低。这些影响与膈肌平均积分肌电图记录的减少明显平行。振动呼吸和非振动呼吸中积分肌电活动的初始时间进程几乎相等。然而，振动呼吸的VT和TI之间的关系相对于非振动（对照）呼吸向下偏移。随着对照呼吸的VT增加，VT的降低加剧。这些发现表明，脊髓上肋间抑制反射通常参与人类呼吸的相位转换机制。
