SciELO - Scientific Electronic Library Online

vol.27 número3Cambios Morfológicos y Bioquímicos de Salmonella hadar Expuestas a Extracto Acuoso de AjoMorfología y Enzimas del Hígado Alteradas en Ratas con Diabetes Inducida por Estreptozotocina índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados




Links relacionados


International Journal of Morphology

versión On-line ISSN 0717-9502


DEL SOL, Mariano  y  VASQUEZ, Bélgica. Anatomical and Clinical Considerations of the Pectoralis Tertius Muscle in Man. Int. J. Morphol. [online]. 2009, vol.27, n.3, pp.715-718. ISSN 0717-9502.

The anatomical variation of the major pectoral muscles is infrequent, namely the agenesis of the pectoralis major muscle due to the morpho-functional alterations it causes. On the other hand, he presence of -supernumerary - pectoral muscles is not common and its physiological, clinical or surgical importance will depend on the stage of its development. The important aspect is that these muscles, while crossing the anterior wall of the axila and inserting in the humerus, may confuse or difficult surgical access to the content of the axillary fossa. Pectoralis tertius muscles were found in two dissected cadavers at the Topographic Anatomy of the Faculty of Medicine of the Universidad de La Frontera, Chile. These muscles were bilateral and independent of the pectoralis major muscle. They originated in the external face of the sixth rib and adjacent regions, and inserted in the coracoid process, the crest of the greater tubercle of the humerus, or next to the insertion of the pectoralis major muscle, contributing to the formation of the anterior wall of the axila. The supernumerary muscles crossing the axillary region, whether in an arched form or elongated as the pectoralis tertius muscles, may confuse the surgeon at the entrance of the axila. In view of the above, it is always necessary to consider the possible existence of this type of anatomical variation.

Palabras clave : Pectoral tertius muscle; human anatomy; muscular variation.

        · resumen en Español     · texto en Inglés     · Inglés ( pdf )


Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons