Folkins J W, Abbs J H
J Speech Hear Res. 1975 Mar;18(1):207-19. doi: 10.1044/jshr.1801.207.
Resistive loads were applied to the jaw during speech production. Loads were initiated during the jaw closing movement associated with the production of bilabial stops, creating a situation in which bilabial closure would be disrupted if motor control were independent of peripheral feedback. Three subjects were observed during control and experimental conditions. In all utterances in which a load was appropriately introduced, closure of the lips was achieved and the bilabial stop was adequately produced. To assess the nature of this control, displacement of the upper lip, lower lip, and jaw, in the inferior-superior dimension, were recorded along with EMG from medial pterygoid, anterior temporalis, masseter, and orbicularis oris superior muscles. Based on observation of these variables, it appears that the muscles of the lips and jaw are capable of on-line compensatory motor reorganization.
在言语产生过程中，对下颌施加了阻力负荷。负荷在与双唇塞音产生相关的下颌闭合运动期间启动，从而创造了一种情况，即如果运动控制独立于外周反馈，双唇闭合将会受到干扰。在对照和实验条件下观察了三名受试者。在所有适当引入负荷的话语中，嘴唇都实现了闭合，并且双唇塞音也得到了充分的发出。为了评估这种控制的性质，记录了上唇、下唇和下颌在上下维度上的位移，以及翼内肌、颞前肌、咬肌和口轮匝肌上部的肌电图。基于对这些变量的观察，嘴唇和下颌的肌肉似乎能够进行在线补偿性运动重组。
