Sakakibara Y
Jpn J Physiol. 1984;34(2):269-82. doi: 10.2170/jjphysiol.34.269.
The electrical activity of the cranial nerves innervating the muscles which contract and dilate the buccal cavity (defined BCcont and BCdil, respectively) was explored in the bullfrog, Rana catesbeiana. The sternohyoid branch of the hypoglossal nerve innervating BCdil showed electrical activity in two consecutive phases: buccal inhalation and lung expiration as well as in the last phase of the pulmonary ventilatory cycle. The last phasic activity was apparently identical to the first one of the succeeding cycle when the cycles were repeated consecutively. The nerves innervating BCcont, consisting of the Vth, VIIth, IXth, Xth, and XIIth cranial nerves, generally showed two consecutive phasic activities in the period of lung expiration and lung inspiration. Thus the present result indicated that during three consecutive phases of the pulmonary ventilatory cycle, the nerve for BCdil was active in the first two phases, and the nerves for BCcont in the last two phases. In both nerve activities the magnitude of the integrated peak activity was smaller in the preceding than in the later phase. In the buccal oscillation cycle, the nerve for BCdil was active during pressure depression while the nerves for BCcont were active during pressure elevation in the buccal cavity. The nerves for both mouth closing and that for tongue retraction had phasic activity during respiratory cycles.
在牛蛙（牛蛙，即牛蛙）中，研究了支配使颊腔收缩和扩张的肌肉（分别定义为BCcont和BCdil）的颅神经的电活动。支配BCdil的舌下神经的胸骨舌骨分支在两个连续阶段显示电活动：颊吸气和肺呼气以及肺通气周期的最后阶段。当周期连续重复时，最后的阶段性活动显然与后续周期的第一个活动相同。支配BCcont的神经由第五、第七、第九、第十和第十二对颅神经组成，通常在肺呼气和肺吸气期间显示两个连续的阶段性活动。因此，目前的结果表明，在肺通气周期的三个连续阶段中，BCdil的神经在前两个阶段活跃，而BCcont的神经在后两个阶段活跃。在两种神经活动中，综合峰值活动的幅度在前一阶段比在后一阶段小。在颊振荡周期中，BCdil的神经在颊腔内压力降低时活跃而BCcont的神经在压力升高时活跃。闭嘴神经和舌回缩神经在呼吸周期中都有阶段性活动。
