Tolu E, Caria M A, Chessa G, Melis F, Simula M E, Podda M V, Solinas A, Deriu F
Institute of Human Physiology, School of Medicine, University of Sassari, Italy.
Arch Ital Biol. 1996 Mar;134(2):141-51.
Experiments performed in the guinea pig were aimed at evaluating the effect of electric or caloric stimulations of the vestibular afferents on the electrical activity of the jaw-closing and jaw-opening trigeminal motoneurons. Results showed that masseter and digastric motoneurons mainly responded to vestibular ampullar activation with excitatory responses, with latencies being shorter for contralateral than ipsilateral ampullar stimulation. Differences in latencies between the jaw-closing and jaw-opening trigeminal motoneurons were observed: the masseter motoneurons constantly responded about 2 msec earlier than the digastric motoneurons. These results suggest that the vestibular-trigeminal relationship is quite complex and uses multiple systems to connect the vestibular apparatus with the trigeminal motor nuclei. From the functional point of view, the vestibular-trigeminal relationship may play a role in the dynamic control of the jaw muscle tone during head movements.
在豚鼠身上进行的实验旨在评估前庭传入神经的电刺激或热刺激对三叉神经闭口和开口运动神经元电活动的影响。结果表明，咬肌和二腹肌运动神经元主要以前庭壶腹激活的兴奋性反应做出反应，对侧壶腹刺激的潜伏期比对侧壶腹刺激的潜伏期短。观察到三叉神经闭口和开口运动神经元之间潜伏期的差异：咬肌运动神经元的反应比二腹肌运动神经元早约2毫秒。这些结果表明，前庭-三叉神经关系相当复杂，并使用多个系统将前庭器官与三叉神经运动核连接起来。从功能角度来看，前庭-三叉神经关系可能在头部运动期间下颌肌张力的动态控制中发挥作用。
