Presence of Incomplete Superficial Axillary Arch and Pectoralis Quartus Muscle in One Male Body

SUMMARY: The anatomical variations of the pectoralis major muscle (PMM) and latissimus dorsi muscle (LDM) range from agenesis to the presence of supernumerary fascicles with a variety of insertions and relationships with the muscles, fascia, vessels, nerves and skeletal components of the shoulder gi...

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Autores principales:	Valencia-V,Alba R, Salgado,José I, Cortés,José S
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2021
Materias:	Anatomy Anatomic variation Axilla Superficial back muscles Pectoralis muscles
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022021000501353
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spelling	oai:scielo:S0717-950220210005013532021-10-19Presence of Incomplete Superficial Axillary Arch and Pectoralis Quartus Muscle in One Male BodyValencia-V,Alba RSalgado,José ICortés,José S Anatomy Anatomic variation Axilla Superficial back muscles Pectoralis muscles SUMMARY: The anatomical variations of the pectoralis major muscle (PMM) and latissimus dorsi muscle (LDM) range from agenesis to the presence of supernumerary fascicles with a variety of insertions and relationships with the muscles, fascia, vessels, nerves and skeletal components of the shoulder girdle and the axilla. Many of these variations are clinically irrelevant, but extremely interesting and revealing from the perspective of comparative anatomy, ontogeny, and phylogeny. In this report, we present two different supernumerary muscles in the chest of one adult male body, identified during dissection practice of undergraduate medical students at Universidad Surcolombiana. These supernumerary fascicles in the axillary region were caudal to the lower edge of the PMM on the right side of the chest, and in contact with the anterior edge of the LDM on the left side of the chest; each fascicle was inserted in the ipsilateral coracoid process. These observations are congruent with the pectoralis quartus muscle and an incomplete and superficial axillary arch, respectively.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.39 n.5 20212021-10-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022021000501353en10.4067/S0717-95022021000501353
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Anatomy Anatomic variation Axilla Superficial back muscles Pectoralis muscles
spellingShingle	Anatomy Anatomic variation Axilla Superficial back muscles Pectoralis muscles Valencia-V,Alba R Salgado,José I Cortés,José S Presence of Incomplete Superficial Axillary Arch and Pectoralis Quartus Muscle in One Male Body
description	SUMMARY: The anatomical variations of the pectoralis major muscle (PMM) and latissimus dorsi muscle (LDM) range from agenesis to the presence of supernumerary fascicles with a variety of insertions and relationships with the muscles, fascia, vessels, nerves and skeletal components of the shoulder girdle and the axilla. Many of these variations are clinically irrelevant, but extremely interesting and revealing from the perspective of comparative anatomy, ontogeny, and phylogeny. In this report, we present two different supernumerary muscles in the chest of one adult male body, identified during dissection practice of undergraduate medical students at Universidad Surcolombiana. These supernumerary fascicles in the axillary region were caudal to the lower edge of the PMM on the right side of the chest, and in contact with the anterior edge of the LDM on the left side of the chest; each fascicle was inserted in the ipsilateral coracoid process. These observations are congruent with the pectoralis quartus muscle and an incomplete and superficial axillary arch, respectively.
author	Valencia-V,Alba R Salgado,José I Cortés,José S
author_facet	Valencia-V,Alba R Salgado,José I Cortés,José S
author_sort	Valencia-V,Alba R
title	Presence of Incomplete Superficial Axillary Arch and Pectoralis Quartus Muscle in One Male Body
title_short	Presence of Incomplete Superficial Axillary Arch and Pectoralis Quartus Muscle in One Male Body
title_full	Presence of Incomplete Superficial Axillary Arch and Pectoralis Quartus Muscle in One Male Body
title_fullStr	Presence of Incomplete Superficial Axillary Arch and Pectoralis Quartus Muscle in One Male Body
title_full_unstemmed	Presence of Incomplete Superficial Axillary Arch and Pectoralis Quartus Muscle in One Male Body
title_sort	presence of incomplete superficial axillary arch and pectoralis quartus muscle in one male body
publisher	Sociedad Chilena de Anatomía
publishDate	2021
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022021000501353
work_keys_str_mv	AT valenciavalbar presenceofincompletesuperficialaxillaryarchandpectoralisquartusmuscleinonemalebody AT salgadojosei presenceofincompletesuperficialaxillaryarchandpectoralisquartusmuscleinonemalebody AT cortesjoses presenceofincompletesuperficialaxillaryarchandpectoralisquartusmuscleinonemalebody
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Presence of Incomplete Superficial Axillary Arch and Pectoralis Quartus Muscle in One Male Body

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