Folkins J W, Zimmermann G N
J Acoust Soc Am. 1981 May;69(5):1441-5. doi: 10.1121/1.385828.
Electromyographic recordings were made from the anterior temporalis, masseter, medial pterygoid, and lateral pterygoid muscles in four normal adult subjects. Discrete bursts of activity occurred in these muscles even during speech with the jaw prevented from moving by placement of a bite block between upper and lower molars. The bursts of muscle activity with the bite block were similar in frequency of occurrence, time of peak activity, and magnitude to the activity observed with the jaw free to move. A motor control system that employs a central simulation process to coordinate the lips and tongue with the jaw is not necessarily consistent with this finding. An efficient central simulation process might be expected to eliminate the discrete jaw-muscle activity with the jaw fixed as well as producing correct responses in the lips and tongue. These data are more consistent with a motor control system employing lower-level neural mechanisms to coordinate articulatory movements.
对四名正常成年受试者的颞肌前部、咬肌、翼内肌和翼外肌进行了肌电图记录。即使在上下磨牙间放置咬块使下颌无法移动的情况下说话时，这些肌肉中仍会出现离散的活动爆发。咬块存在时的肌肉活动爆发在发生频率、活动峰值时间和幅度上，与下颌可自由移动时观察到的活动相似。采用中央模拟过程来协调嘴唇、舌头与下颌的运动控制系统不一定与这一发现相符。人们可能预期一个有效的中央模拟过程既能消除下颌固定时离散的下颌肌肉活动，又能在嘴唇和舌头产生正确反应。这些数据更符合采用较低水平神经机制来协调发音运动的运动控制系统。
