Sakakibara Y
Jpn J Physiol. 1984;34(5):827-38. doi: 10.2170/jjphysiol.34.827.
In bullfrogs with glottis occluded and lungs artificially ventilated, the buccal cavity contractors (BCconts) were found to contract isometrically, meaning that peak buccal pressure (OBP) well represents the total inspiratory nerve activities (TIAs) of BCconts. Unilateral sectioning of the trigeminal (V), hypoglossal, facial, or vagal nerve reduced the magnitude of OBP by 43.3, 28.8, 10.9, or 4.3%, respectively. The integrated peak V activity (I-ENGv) showed a linear relationship to OBP (r = 0.944) in the glottis occluded frog, but a curvilinear relationship to peak buccal pressure (peak BP) in the spontaneously breathing frog during inflation period. The latter relationship was better fitted by a hyperbolic equation (r = 0.943) than by a linear equation (r = 0.927) (p less than 0.001). The relationship between I-ENGv and peak BP showed a hysteresis during deflation period. It was suggested that both I-ENGv and peak BP can be used as a measure of TIAs, but use of the latter requires some reservations.
在声门闭塞且肺部进行人工通气的牛蛙中，发现口腔收缩肌（BCconts）进行等长收缩，这意味着峰值口腔压力（OBP）很好地代表了BCconts的总吸气神经活动（TIAs）。三叉神经（V）、舌下神经、面神经或迷走神经的单侧切断分别使OBP的幅度降低了43.3%、28.8%、10.9%或4.3%。在声门闭塞的青蛙中，整合的峰值V活动（I-ENGv）与OBP呈线性关系（r = 0.944），但在自发呼吸的青蛙吸气期，与峰值口腔压力（峰值BP）呈曲线关系。后一种关系用双曲线方程（r = 0.943）比用线性方程（r = 0.927）拟合得更好（p小于0.001）。在呼气期，I-ENGv与峰值BP之间的关系表现出滞后现象。研究表明，I-ENGv和峰值BP都可以用作TIAs的测量指标，但使用后者需要一些保留意见。
