The Ansa Cervicalis in Fetuses

The formation of ansa cervicalis (AC) is somewhat complex with both its course and location along the common carotid artery and internal jugular vein (IJV) varying. The aim of the study was to document the anatomy, formation and variations of AC. Forty fetuses (gestational age: 15 to 28 weeks) were...

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Autores principales:	Pillay,P, Partab,P, Lazarus,L, Satyapal,K. S
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2012
Materias:	Ansa cervicalis Superior root Inferior root Hypoglossal nerve Internal jugular vein
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000400011
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spelling	oai:scielo:S0717-950220120004000112013-06-20The Ansa Cervicalis in FetusesPillay,PPartab,PLazarus,LSatyapal,K. S Ansa cervicalis Superior root Inferior root Hypoglossal nerve Internal jugular vein The formation of ansa cervicalis (AC) is somewhat complex with both its course and location along the common carotid artery and internal jugular vein (IJV) varying. The aim of the study was to document the anatomy, formation and variations of AC. Forty fetuses (gestational age: 15 to 28 weeks) were obtained from the Department of Clinical Anatomy, Westville Campus, UKZN. A detailed micro-dissection of the posterior triangle of the neck and AC were completed using standard micro-dissecting instruments. Results of the formation of AC, its relationship to IJV and variations were recorded. The superior root was identified as a long willowy nerve that branched from the hypoglossal nerve, descended on the carotid sheath, anterior to the common carotid artery and IJV in 70 % and posterior to IJV in 30 % of the specimens. The inferior root of AC originated from the ventral rami of C2-C3 in 26%; ventral ramus of C3 in 58% and ventral ramus of C2 in 16%. Variations: a) Formation: (i) Dual formation of AC: The Hypoglossal nerve formed separate loops with the ventral rami of C2 and C3 (3%); (ii) "W" shaped appearance of AC above the superior belly of omohyoid (1%); (iii) A "vago-cervical complex" 3%; b) Origin and course: The superior root of AC received a contribution from the hypoglossal nerve, a short distance later it formed a loop around the IJV to ascend to the ventral ramus of C2 as the inferior root. The precise understanding of the anatomy of AC together with variations may assist anesthetists and surgeons to accurately identify the vascular and neural relations during surgical procedures.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.30 n.4 20122012-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000400011en10.4067/S0717-95022012000400011
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Ansa cervicalis Superior root Inferior root Hypoglossal nerve Internal jugular vein
spellingShingle	Ansa cervicalis Superior root Inferior root Hypoglossal nerve Internal jugular vein Pillay,P Partab,P Lazarus,L Satyapal,K. S The Ansa Cervicalis in Fetuses
description	The formation of ansa cervicalis (AC) is somewhat complex with both its course and location along the common carotid artery and internal jugular vein (IJV) varying. The aim of the study was to document the anatomy, formation and variations of AC. Forty fetuses (gestational age: 15 to 28 weeks) were obtained from the Department of Clinical Anatomy, Westville Campus, UKZN. A detailed micro-dissection of the posterior triangle of the neck and AC were completed using standard micro-dissecting instruments. Results of the formation of AC, its relationship to IJV and variations were recorded. The superior root was identified as a long willowy nerve that branched from the hypoglossal nerve, descended on the carotid sheath, anterior to the common carotid artery and IJV in 70 % and posterior to IJV in 30 % of the specimens. The inferior root of AC originated from the ventral rami of C2-C3 in 26%; ventral ramus of C3 in 58% and ventral ramus of C2 in 16%. Variations: a) Formation: (i) Dual formation of AC: The Hypoglossal nerve formed separate loops with the ventral rami of C2 and C3 (3%); (ii) "W" shaped appearance of AC above the superior belly of omohyoid (1%); (iii) A "vago-cervical complex" 3%; b) Origin and course: The superior root of AC received a contribution from the hypoglossal nerve, a short distance later it formed a loop around the IJV to ascend to the ventral ramus of C2 as the inferior root. The precise understanding of the anatomy of AC together with variations may assist anesthetists and surgeons to accurately identify the vascular and neural relations during surgical procedures.
author	Pillay,P Partab,P Lazarus,L Satyapal,K. S
author_facet	Pillay,P Partab,P Lazarus,L Satyapal,K. S
author_sort	Pillay,P
title	The Ansa Cervicalis in Fetuses
title_short	The Ansa Cervicalis in Fetuses
title_full	The Ansa Cervicalis in Fetuses
title_fullStr	The Ansa Cervicalis in Fetuses
title_full_unstemmed	The Ansa Cervicalis in Fetuses
title_sort	ansa cervicalis in fetuses
publisher	Sociedad Chilena de Anatomía
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000400011
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The Ansa Cervicalis in Fetuses

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