Abstract
The activity patterns of the mandibular and labial muscle systems, respectively, were investigated for the purpose of determining whether the functions of the jaw and lips are based on a set of universal neuromotor rules. In the first experiment, intramuscular wire electrodes were placed into the eight muscles of the jaw. The activity of these muscles was recorded along with the displacement of the jaw in two-dimensional space, from three American subjects, during the production of speech at different rates. In the second experiment, intramuscular wire electrodes were placed into seven perioral muscles. EMG activity was recorded along with two-dimensional upper and lower lip movements from three French subjects during labial closure associated with speech production. Results indicated that different individuals use individual motor strategies for the production of the jaw and lip movements, and that the same motor objective can be accomplished by the nervous system in many different ways.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call