ANATOMICAL STUDY ON THE VARIATIONS OF THE ANTERIOR BELLY OF THE DIGASTRIC MUSCLE: ESTUDIO ANATOMICO SOBRE LAS VARIACIONES DE SU VIENTRE ANTERIOR

Several investigators have recently emphasized the need of a better knowledge of the normal anatomy and variations of the anterior belly of the digastric muscle. Hypertrophy of the muscle mass, and variation in number and site of insertion of this muscle in relation to the midline may interfere with...

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Autores principales:	Andreo,Jesús Carlos, Caldas Navarro,João Adolfo, Toledo Filho,João Lopes
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 1997
Materias:	Anatomy Digastric muscle Muscles of the neck Suprahyoid muscles Muscles of mastication
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-98681997000200001
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spelling	oai:scielo:S0716-986819970002000012001-11-06ANATOMICAL STUDY ON THE VARIATIONS OF THE ANTERIOR BELLY OF THE DIGASTRIC MUSCLE: ESTUDIO ANATOMICO SOBRE LAS VARIACIONES DE SU VIENTRE ANTERIORAndreo,Jesús CarlosCaldas Navarro,João AdolfoToledo Filho,João Lopes Anatomy Digastric muscle Muscles of the neck Suprahyoid muscles Muscles of mastication Several investigators have recently emphasized the need of a better knowledge of the normal anatomy and variations of the anterior belly of the digastric muscle. Hypertrophy of the muscle mass, and variation in number and site of insertion of this muscle in relation to the midline may interfere with its functional behavior. Upon clinical or imaging examination, these variations may occasionally be confused with an infarcted submental lymph node. Some investigators have suggested that these variations may be involved in asymmetrical movements of the temporomandibular joint. We report here 5 cases detected during routine dissection in order to alert the professionals to the incidence of this type of variation. The volume of the anterior belly of the digastric muscle in some cases is quite developed, considerably approaching the midsagittal plane. Five cases of variation in number of anterior bellies were detected. In 3 of them only one accessory belly was observed, located in the right antimere in 2 cases and in the left antimere in the third. In 1 case 2 accessory bellies were detected, one in each antimere, although both of them crossed the midsagittal plane in an Xshaped pattern. In another case, 2 accessory bellies were detected in a single antimere, one of them more developed and parallel to the normal belly, and the other less developed and oblique in relation to the normal belly. In view of the multiple anatomical variations and their possible repercussions on the functional behavior of this important suprahyoid muscle, we suggest that all variations should be described and, if possible, that all clinical cases should be documented.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaRevista chilena de anatomía v.15 n.2 19971997-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-98681997000200001en10.4067/S0716-98681997000200001
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Anatomy Digastric muscle Muscles of the neck Suprahyoid muscles Muscles of mastication
spellingShingle	Anatomy Digastric muscle Muscles of the neck Suprahyoid muscles Muscles of mastication Andreo,Jesús Carlos Caldas Navarro,João Adolfo Toledo Filho,João Lopes ANATOMICAL STUDY ON THE VARIATIONS OF THE ANTERIOR BELLY OF THE DIGASTRIC MUSCLE: ESTUDIO ANATOMICO SOBRE LAS VARIACIONES DE SU VIENTRE ANTERIOR
description	Several investigators have recently emphasized the need of a better knowledge of the normal anatomy and variations of the anterior belly of the digastric muscle. Hypertrophy of the muscle mass, and variation in number and site of insertion of this muscle in relation to the midline may interfere with its functional behavior. Upon clinical or imaging examination, these variations may occasionally be confused with an infarcted submental lymph node. Some investigators have suggested that these variations may be involved in asymmetrical movements of the temporomandibular joint. We report here 5 cases detected during routine dissection in order to alert the professionals to the incidence of this type of variation. The volume of the anterior belly of the digastric muscle in some cases is quite developed, considerably approaching the midsagittal plane. Five cases of variation in number of anterior bellies were detected. In 3 of them only one accessory belly was observed, located in the right antimere in 2 cases and in the left antimere in the third. In 1 case 2 accessory bellies were detected, one in each antimere, although both of them crossed the midsagittal plane in an Xshaped pattern. In another case, 2 accessory bellies were detected in a single antimere, one of them more developed and parallel to the normal belly, and the other less developed and oblique in relation to the normal belly. In view of the multiple anatomical variations and their possible repercussions on the functional behavior of this important suprahyoid muscle, we suggest that all variations should be described and, if possible, that all clinical cases should be documented.
author	Andreo,Jesús Carlos Caldas Navarro,João Adolfo Toledo Filho,João Lopes
author_facet	Andreo,Jesús Carlos Caldas Navarro,João Adolfo Toledo Filho,João Lopes
author_sort	Andreo,Jesús Carlos
title	ANATOMICAL STUDY ON THE VARIATIONS OF THE ANTERIOR BELLY OF THE DIGASTRIC MUSCLE: ESTUDIO ANATOMICO SOBRE LAS VARIACIONES DE SU VIENTRE ANTERIOR
title_short	ANATOMICAL STUDY ON THE VARIATIONS OF THE ANTERIOR BELLY OF THE DIGASTRIC MUSCLE: ESTUDIO ANATOMICO SOBRE LAS VARIACIONES DE SU VIENTRE ANTERIOR
title_full	ANATOMICAL STUDY ON THE VARIATIONS OF THE ANTERIOR BELLY OF THE DIGASTRIC MUSCLE: ESTUDIO ANATOMICO SOBRE LAS VARIACIONES DE SU VIENTRE ANTERIOR
title_fullStr	ANATOMICAL STUDY ON THE VARIATIONS OF THE ANTERIOR BELLY OF THE DIGASTRIC MUSCLE: ESTUDIO ANATOMICO SOBRE LAS VARIACIONES DE SU VIENTRE ANTERIOR
title_full_unstemmed	ANATOMICAL STUDY ON THE VARIATIONS OF THE ANTERIOR BELLY OF THE DIGASTRIC MUSCLE: ESTUDIO ANATOMICO SOBRE LAS VARIACIONES DE SU VIENTRE ANTERIOR
title_sort	anatomical study on the variations of the anterior belly of the digastric muscle: estudio anatomico sobre las variaciones de su vientre anterior
publisher	Sociedad Chilena de Anatomía
publishDate	1997
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-98681997000200001
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ANATOMICAL STUDY ON THE VARIATIONS OF THE ANTERIOR BELLY OF THE DIGASTRIC MUSCLE: ESTUDIO ANATOMICO SOBRE LAS VARIACIONES DE SU VIENTRE ANTERIOR

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