Furusawa K, Yamaoka M, Fujimoto K, Kumai T
Oral and Maxillofacial Surgery Department II, Matsumoto Dental College, Nagano, Japan.
Brain Res Bull. 1994;35(3):233-6. doi: 10.1016/0361-9230(94)90127-9.
Afferent discharges of the mylohyoid muscle branch during respiration were studied electrophysiologically in the rat. Afferent discharges from the mylohyoid muscle branch of the mylohyoid nerve were found to be synchronized with respiration. Stretching of the mylohyoid muscle elicited afferent discharges of the mylohyoid muscle branch, suggesting that lengthening of the mylohyoid muscle caused electrical activity in the proprioceptors. When the central cut end of the mylohyoid muscle branch was stimulated electrically, reflex discharges were recorded from the EMG lead at the sternohyoid muscle where it is innervated by the cervical nerve. The latency between the electrical stimulation and the action potential in the sternohyoid muscle was 3-4 ms. Therefore, the mylohyoid muscle branch may transmit information to the sternohyoid muscle regarding the stretching actions of the mylohyoid muscle resulting from movements of the hyoid bone.
采用电生理学方法对大鼠呼吸过程中下颌舌骨肌分支的传入放电进行了研究。发现下颌舌骨神经下颌舌骨肌分支的传入放电与呼吸同步。拉伸下颌舌骨肌可引发下颌舌骨肌分支的传入放电，提示下颌舌骨肌的拉长会引起本体感受器的电活动。当对下颌舌骨肌分支的中枢切断端进行电刺激时，在由颈神经支配的胸骨舌骨肌处的肌电图导线上记录到了反射放电。电刺激与胸骨舌骨肌动作电位之间的潜伏期为3 - 4毫秒。因此，下颌舌骨肌分支可能会将与舌骨运动导致的下颌舌骨肌拉伸动作相关的信息传递给胸骨舌骨肌。
