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Running head: EFFECTS OF ORBICULARIS ORIS AND JAW POSTURE ON LIP SHAPE A Biomechanical Modeling Study of the Effects of the Orbicularis Oris Muscle and Jaw Posture on Lip Shape
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In: http://halshs.archives-ouvertes.fr/docs/00/84/29/26/PDF/Stavness_JSLHR_2013.pdf (2013)
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Abstract:
Purpose: We used a biomechanical model of the orofacial system, to investigate two issues in speech production: (1) the link between lip muscle anatomy and variability in lip gestures; (2) the constraints of coupled lip/jaw biomechanics on jaw posture in labial sounds. Method: Our methodology is based on computer simulations with a sophisticated biomechanical model coupling the jaw, tongue and face. First, the influence of Orbicularis Oris (OO) muscle geometry is analyzed. We assessed how changes to the OO anatomical implementation, in terms of depth (from epidermis to the skull) and peripheralness (proximity to the lip horn center), hal-00842926, version 1- 9 Jul 2013 affected lip protrusion, lip spreading and lip area. Second, we evaluated the capability of the lip/jaw system to generate protrusion and rounding, or labial closure for different jaw heights. Results: (1) A highly peripheral and moderately deep OO implementation is most appropriate for achieving protrusion and rounding; (2) a superficial implementation facilitates closure; (3) protrusion and rounding requires a high jaw position; (4) labial closure is achievable for various jaw heights.
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Keyword:
biomechanics; speec
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URL: http://halshs.archives-ouvertes.fr/docs/00/84/29/26/PDF/Stavness_JSLHR_2013.pdf
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.394.7089
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Running head: EFFECTS OF ORBICULARIS ORIS AND JAW POSTURE ON LIP SHAPE A Biomechanical Modeling Study of the Effects of the Orbicularis Oris Muscle and Jaw Posture on Lip Shape
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In: http://hal.inria.fr/docs/00/84/29/26/PDF/Stavness_JSLHR_2013.pdf
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