Electromyographic Studies of Facial Muscle Co-Ordination During Speech

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Abstract
The study of the neuromuscular basis for speech production is of great interest in speech research. The usefulness and importance of lip reading shows that the facial region transmits a large amount of speech information. The muscles here are also easily accessible for EMG work. However, the stereotyped and easily reproduced speech gestures are also suitable for the study of the complex function of the facial muscles. The optimal electrode positions were found by first dissecting cadavers. The individual muscles of a living person were located by palpation during voluntary contraction. After insertion of the needle, its depth was adjusted to pick up the maximum activity during the performance of speech gestures. The results from the first study covering all lip muscles are being used as the basis for further investigations which are partly presented here.

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