Caeser M, Ostwald J, Pilz P K
Department of Animal Physiology, University of Tübingen, Federal Republic of Germany.
Behav Neurosci. 1989 Oct;103(5):1075-81. doi: 10.1037//0735-7044.103.5.1075.
Electromyographic (EMG) potentials of several head muscles were recorded simultaneously in freely moving rats with chronically implanted electrodes. The startle responses of m. temporalis, m. levator auris, and m. levator labii superior were compared. All muscles showed a parallel decrease in latency and an increase in response elicitability and amplitude with an increase in stimulus intensity. A significant latency difference of about 1 ms existed between m. levator auris and m. temporalis. The shortest latency of the EMG response in m. levator auris was 5.5 ms (110 dB SPL). A common fluctuation in response amplitude and latency was found in simultaneous recordings of muscles innervated by the facial and trigeminal nerve, respectively. This shows a common modulatory input to the startle pathway to the cranial motor nuclei.
使用长期植入电极在自由活动的大鼠中同时记录几块头部肌肉的肌电图（EMG）电位。比较了颞肌、耳上提肌和上唇提肌的惊吓反应。随着刺激强度的增加，所有肌肉的潜伏期均呈平行下降，反应诱发能力和幅度均增加。耳上提肌和颞肌之间存在约1 ms的显著潜伏期差异。耳上提肌中EMG反应的最短潜伏期为5.5 ms（110 dB声压级）。在分别由面神经和三叉神经支配的肌肉的同步记录中发现了反应幅度和潜伏期的共同波动。这表明对通向颅运动核的惊吓通路存在共同的调节输入。
