Architecture of the Suprahyoid Muscles: A Volumetric Musculoaponeurotic Analysis.

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Bibliographic Details
Title:	Architecture of the Suprahyoid Muscles: A Volumetric Musculoaponeurotic Analysis.
Authors:	Shaw, Stephanie M.¹ stephanie.shaw@mail.utoronto.ca, Martino, Rosemary^1,2,3, Mahdi, Ali⁴, Sawyer, Forrest Kip⁴, Mathur, Sunita⁵, Hope, Andrew⁶, Agurd, Anne M.⁴
Source:	Journal of Speech, Language & Hearing Research. Oct2017, Vol. 60 Issue 10, p2808-2818. 11p. 5 Diagrams, 5 Charts.
Subject Terms:	Submental triangle, Deglutition, Neck muscles, Hyoid bone, Anatomy, Physiology, Analysis of variance, Dead, Deglutition disorders, Probability theory, Research evaluation, Research funding, Structural models, T-test (Statistics), Data analysis software, Tendons, Descriptive statistics
Abstract:	Purpose: Suprahyoid muscles play a critical role in swallowing. The arrangement of the fiber bundles and aponeuroses has not been investigated volumetrically, even though muscle architecture is an important determinant of function. Thus, the purpose was to digitize, model in three dimensions and quantify the architectural parameters of the suprahyoid muscles to determine and compare their relative functional capabilities. Method: Fiber bundles and aponeuroses from 11 formalinembalmed specimens were serially dissected and digitized in situ. Data were reconstructed in three dimensions using Autodesk Maya. Architectural parameters were quantified, and data were compared using independent samples t-tests and analyses of variance. Results: Based on architecture and attachment sites, suprahyoid muscles were divided into 3 groups: anteromedial, superolateral, and superoposterior. Architectural parameters differed significantly (p < .05) across muscles and across the 3 groups, suggesting differential roles in hyoid movement during swallowing. When activated simultaneously, anteromedial and superoposterior muscle groups could work together to elevate the hyoid. Conclusions: The results suggest that the suprahyoid muscles can have individualized roles in hyoid excursion during swallowing. Muscle balance may be important for identifying and treating hyolaryngeal dysfunction in patients with dysphagia. [ABSTRACT FROM AUTHOR]
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Database:	Education Research Complete

Description
Abstract:	Purpose: Suprahyoid muscles play a critical role in swallowing. The arrangement of the fiber bundles and aponeuroses has not been investigated volumetrically, even though muscle architecture is an important determinant of function. Thus, the purpose was to digitize, model in three dimensions and quantify the architectural parameters of the suprahyoid muscles to determine and compare their relative functional capabilities. Method: Fiber bundles and aponeuroses from 11 formalinembalmed specimens were serially dissected and digitized in situ. Data were reconstructed in three dimensions using Autodesk Maya. Architectural parameters were quantified, and data were compared using independent samples t-tests and analyses of variance. Results: Based on architecture and attachment sites, suprahyoid muscles were divided into 3 groups: anteromedial, superolateral, and superoposterior. Architectural parameters differed significantly (p < .05) across muscles and across the 3 groups, suggesting differential roles in hyoid movement during swallowing. When activated simultaneously, anteromedial and superoposterior muscle groups could work together to elevate the hyoid. Conclusions: The results suggest that the suprahyoid muscles can have individualized roles in hyoid excursion during swallowing. Muscle balance may be important for identifying and treating hyolaryngeal dysfunction in patients with dysphagia. [ABSTRACT FROM AUTHOR]
ISSN:	10924388
DOI:	10.1044/2017_JSLHR-S-16-0277