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Three-dimensional lateral pterygoid muscle volume: MRI analyses with insertion patterns correlation.

Authors :
Melke, Gabriela Sobral de Figueiredo
Costa, André Luiz Ferreira
Lopes, Sérgio Lúcio Pereira de Castro
Fuziy, Acacio
Ferreira-Santos, Rívea Inês
Source :
Annals of Anatomy; Nov2016, Vol. 208, p9-18, 10p
Publication Year :
2016

Abstract

We evaluated lateral pterygoid muscle volume in closed and open mouth positions in association with anterior disc displacement, effusion and abnormal articular disc shape from three-dimensional reformations of MRI. A total of 24 MRI of a sample (15 females, 9 males) aged 19–64 years (37.2 years ± 11.4) were assessed. Segmentation and volumetric assessment of the total, upper and lower heads of the lateral pterygoid muscle were performed using free software. The upper head of the lateral pterygoid muscle had a smaller volume than the lower head at both sides, in the closed- and open-mouth positions. In the open-mouth position, individuals with a subdivided upper head, where one component was inserted in the articular disc and another in the mandibular head, displayed a significantly larger volume of the upper head compared to individuals who had a single attachment to the articular disc ( p = 0.0130). The lateral pterygoid muscle has different volumes in the closed- and open-mouth positions. Gender affected muscle volume, specifically the upper head component. Insertion type in the upper head also seemed to affect muscle volume. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09409602
Volume :
208
Database :
Supplemental Index
Journal :
Annals of Anatomy
Publication Type :
Academic Journal
Accession number :
119159578
Full Text :
https://doi.org/10.1016/j.aanat.2016.05.007