Hindawi BioMed Research International Volume 2018, Article ID 9404508, 12 pages https://doi.org/10.1155/2018/9404508 Research Article Inter- and Intraspecific Variations in the Pectoral Muscles of Common Chimpanzees (Pan troglodytes), Bonobos (Pan paniscus), and Humans (Homo sapiens) J. M. Potau ,1 J. Arias-Martorell,1,2 G. Bello-Hellegouarch,1,3 A. Casado,1 J. F. Pastor,4 F. de Paz,4 and R. Diogo5 1 Unit of Human Anatomy and Embryology, University of Barcelona, C/Casanova 143, 08036 Barcelona, Spain 2AnimalPostcranialEvolution(APE)Lab,SkeletalBiologyResearchCentre,SchoolofAnthropologyandConservation, University of Kent, Canterbury CT2 7NR, UK 3Department of Biology, FFCLRP, University of Sao˜ Paulo, Avenida Bandeirantes 3900, Ribeirao˜ Preto, SP, Brazil 4Department of Anatomy and Radiology, University of Valladolid, C/Ramon´ y Cajal 7, 47005 Valladolid, Spain 5Department of Anatomy, Howard University College of Medicine, Washington, DC 20059, USA Correspondence should be addressed to J. M. Potau;
[email protected] Received 27 July 2017; Revised 11 December 2017; Accepted 26 December 2017; Published 21 January 2018 Academic Editor: Ayhan Comert¨ Copyright © 2018 J. M. Potau 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. We have analyzed anatomic variations in the pectoralis major and pectoralis minor muscles of common chimpanzees (Pan troglodytes) and bonobos (Pan paniscus) and compared them to anatomic variations in these muscles in humans (Homo sapiens).We have macroscopically dissected these muscles in six adult Pan troglodytes,fivePan paniscus of ages ranging from fetus to adult, and five adult Homo sapiens.