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Anatomy Research International
Volume 2012 (2012), Article ID 485149, 6 pages
Clinical Study

Analysis on the Incidence of the Fibularis Quartus Muscle Using Magnetic Resonance Imaging

1Macroscopic Anatomy and Anatomy by Radiologic Imaging, São Camilo University Center, São Paulo, SP, Brazil
2Biomedicine, São Camilo University Center, São Paulo, SP, Brazil
3São Camilo University Center, 04263-100 São Paulo, SP, Brazil
4Paulista School of Medicine, Federal University of São Paulo, Rua Botucatu, 740, V. Clementino, 04023-062 São Paulo, SP, Brazil

Received 15 February 2012; Accepted 17 May 2012

Academic Editor: Nihal Apaydin

Copyright © 2012 Sérgio Ricardo Rios Nascimento et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objective. Quantify the presence of the fibularis quartus muscle and correlate it with the individual's sex and concomitant presence of the fibularis tertius muscle. Materials and Methods. We evaluated 211 magnetic resonance examinations (43.13% men and 56.87% women) on the ankle and hindfoot, produced between 2009 and 2011. Results. The fourth fibularis muscle was found to be present in 7.62% of the examinations and 75% of these also contained the fibularis tertius muscle. Conclusion. The incidence of the fourth fibularis muscle is variable; moreover, its incidence does not depend on the individual's gender or the presence of the fibularis tertius muscle.