What is it about?
The lower jaw (i.e. the mandible) is rapidly moved during speech but there is little information as to the muscle activations effecting those movements. This study shows that the activities of 2 deeply located jaw muscles in the face (the pterygoid muscles) are tightly linked to the nuances of different speech sounds and suggest a key role for the pterygoid muscles in the fine control of speech production.
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Why is it important?
The present findings provide insights into the possible interactions between speech and orofacial activities (e.g. chewing) and dysfunctional conditions (e.g. Temporomandibular Disorders) that involve the pterygoid muscles. The findings suggest that the pterygoid muscles are heavily involved during speech and particularly in individuals who perform speech regularly throughout the day, for example, broadcasters, telephonists, singers, teachers, journalists, and politicians. Heavy demands placed on these muscles during speech may have implications for patients with orofacial disorders, many of whom have painful jaw muscles, including the pterygoid muscles. These results also suggest that dental procedures that affect speech (e.g. prosthodontic, orthodontic, restorative, and surgical procedures) may also alter the activity of the pterygoid muscles during speech. The present study also provides baseline data for developing algorithms for driving actuators in the development of automatons simulating speech.
Read the Original
This page is a summary of: Pterygoid muscle activity in speech: A preliminary investigation, Journal of Oral Rehabilitation, October 2022, Wiley, DOI: 10.1111/joor.13377.
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