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The Mechanical Significance of the Temporal Fasciae in Macaca fascicularis: An Investigation Using Finite Element Analysis

Curtis, Neil; Witzel, Ulrich; Fitton, Laura; O'Higgins, Paul; Fagan, Michael


Neil Curtis

Ulrich Witzel

Laura Fitton

Paul O'Higgins

Michael Fagan


Computational finite element analyses (FEAs) of the skull predict structural deformations under user specified loads and constraints, with results normally presented as stress and strain distributions over the skull's surface. The applied loads are generally a representation of the major adductor musculature, with the skull constrained at bite positions and at the articulating joints. However, virtually all analyses ignore potentially important anatomical structures, such as the fasciae that cover the temporalis muscle and attach onto the zygomatic arch. In vivo experimental studies have shown that removal of the temporal fasciae attachment onto the zygomatic arch in Cebus monkeys results in significant bone adaptation and remodeling in this region, suggesting the fasciae play an important role in stabilising the arch during biting. Here we investigate this potential stabilising role by carrying out FEAs of a macaque skull with and without temporal fasciae included. We explore the extent to which the zygomatic arch might be stabilized during biting by a synchronized tensioning of the temporal fasciae, acting to oppose masseteric contraction forces. According to our models, during temporalis muscle bulging the forces generated within the tensioned temporal fasciae are large enough to oppose the pull of the masseter. Further, a near bending-free state of equilibrium within the arch can be reached, even under forceful biting. We show that it is possible to eliminate the high strain gradients in and around the zygomatic arch that are present in past computational studies, with strains being more uniform in magnitude than previously thought. © 2011 Wiley-Liss, Inc.


Curtis, N., Witzel, U., Fitton, L., O'Higgins, P., & Fagan, M. (2011). The Mechanical Significance of the Temporal Fasciae in Macaca fascicularis: An Investigation Using Finite Element Analysis. Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology, 294(7), 1178-1190.

Journal Article Type Article
Acceptance Date Mar 25, 2011
Online Publication Date May 25, 2011
Publication Date 2011-07
Deposit Date Nov 13, 2014
Publicly Available Date Nov 23, 2017
Journal Anatomical Record-Advances In Integrative Anatomy And Evolutionary Biology
Print ISSN 1932-8486
Electronic ISSN 1932-8494
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 294
Issue 7
Pages 1178-1190
Keywords Biotechnology; Anatomy; Ecology, Evolution, Behavior and Systematics; Histology
Public URL
Publisher URL


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