通过刺激大鼠红核促进下颌反射
Facilitation of the jaw reflexes by stimulation of the red nucleus in the rat.
作者信息
Satoh Yoshihide, Ishizuka Ken'Ichi, Murakami Toshiki
机构信息
Department of Physiology, School of Dentistry at Niigata, The Nippon Dental University, 1-8 Hamaura-cho, Niigata 951-8580, Japan.
出版信息
Brain Res. 2003 Jul 18;978(1-2):51-8. doi: 10.1016/s0006-8993(03)02763-x.
The effects of the red nucleus (RN) stimulation on the jaw-opening reflex (JOR) and the masseteric monosynaptic reflex (MMR) were studied in anesthetized rats. The JOR was evoked by electrical stimulation of the inferior alveolar nerve. The MMR was evoked by electrical stimulation of the mesencephalic trigeminal nucleus. The JOR and the MMR were recorded as electromyographic responses of the anterior belly of the digastric and the masseter muscles, respectively. The conditioning electrical stimulation of the RN facilitated both the JOR and the MMR bilaterally. The facilitatory effect on the JOR was much larger than that on the MMR. Additionally, microinjection of monosodium glutamate into the RN also elicited facilitation of the JOR and the MMR. The results suggest the RN plays an important role in reflex control of jaw movements.
在麻醉大鼠中研究了红核（RN）刺激对张口反射（JOR）和咬肌单突触反射（MMR）的影响。JOR通过电刺激下牙槽神经诱发。MMR通过电刺激中脑三叉神经核诱发。JOR和MMR分别记录为二腹肌前腹和咬肌的肌电图反应。RN的条件性电刺激双侧促进了JOR和MMR。对JOR的促进作用比对MMR的促进作用大得多。此外，向RN中微量注射谷氨酸钠也能诱发JOR和MMR的促进作用。结果表明RN在颌运动的反射控制中起重要作用。
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