Yasui Y, Kogo M, Iida S, Hamaguchi M, Koizumi H, Kohara H, Matsuya T
First Department of Oral and Maxillofacial Surgery, Osaka University, Japan.
J Osaka Univ Dent Sch. 1993 Dec;33:27-33.
In this study, the activities of the two external glossal muscles, Genioglossus (Gg) and Styloglossus (Sg), related to respiration were examined through the electromyography (EMG) in dog. During quiet breathing, no phasic respiratory activity were observed in either muscle. With hypercapnic condition induced by closed rebreathing respiratory system, both Sg and Gg showed phasic respiratory activities in respiration period. At first inspiratory EMG activity was observed from Sg (PaCO2 > 50 mmHg), then after a while from Gg (PaCO2 > 55 mmHg). NaCN injection bilaterally to the carotid body enhances the inspiratory ENG activities in both muscles. Sg was more sensitive than Gg to respiratory stimulation such as hypercapnia or NaCN injection.
在本研究中，通过对犬的肌电图（EMG）检查了与呼吸相关的两块舌外肌，即颏舌肌（Gg）和茎突舌肌（Sg）的活动。在安静呼吸期间，未在任何一块肌肉中观察到阶段性呼吸活动。通过封闭再呼吸呼吸系统诱导高碳酸血症状态时，Sg和Gg在呼吸周期均表现出阶段性呼吸活动。首先在Sg观察到吸气肌电图活动（动脉血二氧化碳分压>50 mmHg），一段时间后在Gg观察到（动脉血二氧化碳分压>55 mmHg）。双侧颈动脉体注射氰化钠可增强两块肌肉的吸气ENG活动。Sg对高碳酸血症或氰化钠注射等呼吸刺激比Gg更敏感。
