Unilateral Quadripartite Composition of Pectoral Major Muscle: Anatomical Description and Clinical Implications

A unilateral anomalous disposition of the muscular slips of pectoralis major was observed in an adult male cadaver during routine gross anatomy teaching session. The pectoralis major muscle displayed unusual configuration and comprised of four parts delineated by three intramuscular clefts. Further,...

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Autores principales:	Dhuria,Ruchi, Mehta,Vandana, Loh,Hitendra, Arora,Jyoti, Roy,Sanchita, Suri,Rajesh, Rath,Gayatri
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2009
Materias:	Pectoralis major muscle Muscle Anomaly Innervation
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000400040
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spelling	oai:scielo:S0717-950220090004000402010-05-18Unilateral Quadripartite Composition of Pectoral Major Muscle: Anatomical Description and Clinical ImplicationsDhuria,RuchiMehta,VandanaLoh,HitendraArora,JyotiRoy,SanchitaSuri,RajeshRath,Gayatri Pectoralis major muscle Muscle Anomaly Innervation A unilateral anomalous disposition of the muscular slips of pectoralis major was observed in an adult male cadaver during routine gross anatomy teaching session. The pectoralis major muscle displayed unusual configuration and comprised of four parts delineated by three intramuscular clefts. Further, the sternocostal part was found to divide into two fasciculi. The origin and insertion of pectoralis major muscle was as usual and unremarkable. Interestingly, the innervation of the muscle was observed to bear an important variation. The clavicular and sternocostal slips of pectoralis major muscle received a direct branch from the lateral cord of brachial plexus in addition to its usual innervation from the lateral and medial pectoral nerves. The multiplicity of innervation of pectoralis major as encountered in the present study would presumably augment its suitability for its use in reconstructive procedures. An additional anomalous attachment of the pectoralis minor muscle was also observed emanating from the second rib, apart from the usual third, fourth and fifth ribs. These variants of the pectoral muscles may also have implications in biomechanical studies, as they may alter the kinematics.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.27 n.4 20092009-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000400040en10.4067/S0717-95022009000400040
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Pectoralis major muscle Muscle Anomaly Innervation
spellingShingle	Pectoralis major muscle Muscle Anomaly Innervation Dhuria,Ruchi Mehta,Vandana Loh,Hitendra Arora,Jyoti Roy,Sanchita Suri,Rajesh Rath,Gayatri Unilateral Quadripartite Composition of Pectoral Major Muscle: Anatomical Description and Clinical Implications
description	A unilateral anomalous disposition of the muscular slips of pectoralis major was observed in an adult male cadaver during routine gross anatomy teaching session. The pectoralis major muscle displayed unusual configuration and comprised of four parts delineated by three intramuscular clefts. Further, the sternocostal part was found to divide into two fasciculi. The origin and insertion of pectoralis major muscle was as usual and unremarkable. Interestingly, the innervation of the muscle was observed to bear an important variation. The clavicular and sternocostal slips of pectoralis major muscle received a direct branch from the lateral cord of brachial plexus in addition to its usual innervation from the lateral and medial pectoral nerves. The multiplicity of innervation of pectoralis major as encountered in the present study would presumably augment its suitability for its use in reconstructive procedures. An additional anomalous attachment of the pectoralis minor muscle was also observed emanating from the second rib, apart from the usual third, fourth and fifth ribs. These variants of the pectoral muscles may also have implications in biomechanical studies, as they may alter the kinematics.
author	Dhuria,Ruchi Mehta,Vandana Loh,Hitendra Arora,Jyoti Roy,Sanchita Suri,Rajesh Rath,Gayatri
author_facet	Dhuria,Ruchi Mehta,Vandana Loh,Hitendra Arora,Jyoti Roy,Sanchita Suri,Rajesh Rath,Gayatri
author_sort	Dhuria,Ruchi
title	Unilateral Quadripartite Composition of Pectoral Major Muscle: Anatomical Description and Clinical Implications
title_short	Unilateral Quadripartite Composition of Pectoral Major Muscle: Anatomical Description and Clinical Implications
title_full	Unilateral Quadripartite Composition of Pectoral Major Muscle: Anatomical Description and Clinical Implications
title_fullStr	Unilateral Quadripartite Composition of Pectoral Major Muscle: Anatomical Description and Clinical Implications
title_full_unstemmed	Unilateral Quadripartite Composition of Pectoral Major Muscle: Anatomical Description and Clinical Implications
title_sort	unilateral quadripartite composition of pectoral major muscle: anatomical description and clinical implications
publisher	Sociedad Chilena de Anatomía
publishDate	2009
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000400040
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Unilateral Quadripartite Composition of Pectoral Major Muscle: Anatomical Description and Clinical Implications

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