Anatomical variations of the median nerve in axilla and arm in fetuses from Córdoba, Argentina

The median nerve, is a mixed nerve, terminal branch of the brachial plexus, which contains fibers from the five roots that make up this plexus (C5, C6, C7, C8 y T1),  a fact that determine its importance, in addition to its territory of innervation. The a...

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Autores principales: Prato Ullán, J, Mora , CB, Pizarro, LS, Corball, AG
Formato: Artículo revista
Lenguaje:Español
Publicado: Universidad Nacional Córdoba. Facultad de Ciencias Médicas. Secretaria de Ciencia y Tecnología 2023
Materias:
Acceso en línea:https://revistas.unc.edu.ar/index.php/med/article/view/42773
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id I10-R327-article-42773
record_format ojs
institution Universidad Nacional de Córdoba
institution_str I-10
repository_str R-327
container_title_str Revista de la Facultad de Ciencias Médicas de Córdoba
language Español
format Artículo revista
topic median nerve
anatomical variations
fetuses
nervio mediano
variaciones anatómicas
fetos
spellingShingle median nerve
anatomical variations
fetuses
nervio mediano
variaciones anatómicas
fetos
Prato Ullán, J
Mora , CB
Pizarro, LS
Corball, AG
Anatomical variations of the median nerve in axilla and arm in fetuses from Córdoba, Argentina
topic_facet median nerve
anatomical variations
fetuses
nervio mediano
variaciones anatómicas
fetos
author Prato Ullán, J
Mora , CB
Pizarro, LS
Corball, AG
author_facet Prato Ullán, J
Mora , CB
Pizarro, LS
Corball, AG
author_sort Prato Ullán, J
title Anatomical variations of the median nerve in axilla and arm in fetuses from Córdoba, Argentina
title_short Anatomical variations of the median nerve in axilla and arm in fetuses from Córdoba, Argentina
title_full Anatomical variations of the median nerve in axilla and arm in fetuses from Córdoba, Argentina
title_fullStr Anatomical variations of the median nerve in axilla and arm in fetuses from Córdoba, Argentina
title_full_unstemmed Anatomical variations of the median nerve in axilla and arm in fetuses from Córdoba, Argentina
title_sort anatomical variations of the median nerve in axilla and arm in fetuses from córdoba, argentina
description The median nerve, is a mixed nerve, terminal branch of the brachial plexus, which contains fibers from the five roots that make up this plexus (C5, C6, C7, C8 y T1),  a fact that determine its importance, in addition to its territory of innervation. The aim is to investigate the anatomical varieties in the formation of median nerve and its abnormal communication with other terminal branches of the brachial plexus.  Also, determine the bilaterally of these, their incidence according to sex and highlight their clinical importance. 30 axillary and anterior regions of arms corresponding to 15 fetuses were dissected, from the Hospital Misericordia and the Maternidad Provincial of the City of Córdoba, up to 500 g, from 16 to 24 weeks of gestation, fixed in 5% formaldehyde. The specimens were placed in a supine position and the area was accessed through an anterior approach using microdissection techniques and instruments. Subsequently, the results were tabulated for correct interpretation and analysis. 4 types of varieties were found: IIb (3 roots, the extra root comes from the musculocutaneous nerve); IIe (3 roots, the extra root comes from the anterior branch of the middle trunk); VI (communicating branch with musculocutaneous nerve) and VIIe (the anterior branch of the middle trunk forms the lateral root of the median nerve). 25 regions were unremarkable (83,33%) and 5 with varieties (16,67%).  Type IIb and VI variations occurred in 2 plexuses and type IIe and VIIe only in one. Moreover, in the same plexus, type IIb and VIIe variations were presented. In conclusion, the anatomical variations described are present in a 16,67% of the regions explored. Of these cases, 3 were unilateral and 1 was bilateral asymmetric. In addition, 80% of the varieties occurred in male fetuses and 20% in femenine. Given that the existence of research projects on this topic, particularly in fetuses, is scarce, this article allows us to generate a record with the purpose of preventing diagnostic errors due to atypical symptoms and iatrogenic lesions due to confusion in surgical procedures and anesthesia.
publisher Universidad Nacional Córdoba. Facultad de Ciencias Médicas. Secretaria de Ciencia y Tecnología
publishDate 2023
url https://revistas.unc.edu.ar/index.php/med/article/view/42773
work_keys_str_mv AT pratoullanj anatomicalvariationsofthemediannerveinaxillaandarminfetusesfromcordobaargentina
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first_indexed 2024-09-03T21:04:58Z
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spelling I10-R327-article-427732023-10-19T21:19:20Z Anatomical variations of the median nerve in axilla and arm in fetuses from Córdoba, Argentina Variaciones anatómicas del nervio mediano en axila y brazo en fetos de Córdoba, Argentina Prato Ullán, J Mora , CB Pizarro, LS Corball, AG median nerve anatomical variations fetuses nervio mediano variaciones anatómicas fetos The median nerve, is a mixed nerve, terminal branch of the brachial plexus, which contains fibers from the five roots that make up this plexus (C5, C6, C7, C8 y T1),  a fact that determine its importance, in addition to its territory of innervation. The aim is to investigate the anatomical varieties in the formation of median nerve and its abnormal communication with other terminal branches of the brachial plexus.  Also, determine the bilaterally of these, their incidence according to sex and highlight their clinical importance. 30 axillary and anterior regions of arms corresponding to 15 fetuses were dissected, from the Hospital Misericordia and the Maternidad Provincial of the City of Córdoba, up to 500 g, from 16 to 24 weeks of gestation, fixed in 5% formaldehyde. The specimens were placed in a supine position and the area was accessed through an anterior approach using microdissection techniques and instruments. Subsequently, the results were tabulated for correct interpretation and analysis. 4 types of varieties were found: IIb (3 roots, the extra root comes from the musculocutaneous nerve); IIe (3 roots, the extra root comes from the anterior branch of the middle trunk); VI (communicating branch with musculocutaneous nerve) and VIIe (the anterior branch of the middle trunk forms the lateral root of the median nerve). 25 regions were unremarkable (83,33%) and 5 with varieties (16,67%).  Type IIb and VI variations occurred in 2 plexuses and type IIe and VIIe only in one. Moreover, in the same plexus, type IIb and VIIe variations were presented. In conclusion, the anatomical variations described are present in a 16,67% of the regions explored. Of these cases, 3 were unilateral and 1 was bilateral asymmetric. In addition, 80% of the varieties occurred in male fetuses and 20% in femenine. Given that the existence of research projects on this topic, particularly in fetuses, is scarce, this article allows us to generate a record with the purpose of preventing diagnostic errors due to atypical symptoms and iatrogenic lesions due to confusion in surgical procedures and anesthesia. El nervio mediano, es un nervio mixto rama terminal del plexo braquial, que contiene fibras procedentes de las cinco raíces que conforman este plexo (C5, C6, C7, C8 y T1), hecho que determina la importancia del mismo, además de su territorio de inervación. El objetivo es investigar las variedades anatómicas en la formación del nervio mediano y su comunicación anormal con otras ramas terminales del plexo braquial. También, determinar la bilateralidad de estas, su incidencia según sexo y destacar su importancia clínica. Se disecaron 30 regiones axilares y anteriores de brazos correspondientes a 15 fetos, provenientes del hospital misericordia y la maternidad provincial de la Ciudad de Córdoba, de hasta 500 gr, de 16 a 24 semanas de gestación, fijados en formol al 5%. Los especímenes, se colocaron en posición decúbito supino y se accedió a la zona a través de un abordaje anterior utilizando técnicas e instrumental de microdisección. Posteriormente, los resultados se tabularon para su correcta interpretación y análisis. Se encontraron 4 tipos de variedades: IIb (3 raíces, la raíz extra proviene del nervio musculocutáneo); IIe (3 raíces, la raíz extra proviene de la rama anterior del tronco medio); VI (rama comunicante con el nervio músculocutáneo) y VIIe (la rama anterior del tronco medio forma la raíz lateral del nervio mediano). 25 regiones se hallaron sin particularidades (83,33%) y 5 con variedades (16,67%). Las variaciones tipo IIb y VI se presentaron en 2 plexos, y las del tipo IIe y VIIe solo en uno. Además, en un mismo plexo, se presentaron las variaciones tipo IIb y VIIe. En conclusión, las variaciones anatómicas descriptas se presentan en un 16,67% de las regiones exploradas. De estos casos 3 eran unilaterales y 1 era bilateral asimétrico. Además, el 80% de las variedades se presentó en fetos de sexo masculino y el 20% femeninos. Dado que la existencia de proyectos de investigación sobre este tema, particularmente en fetos, es escasa, el presente artículo nos permite generar un registro con el propósito de prevenir errores diagnósticos por síntomas atípicos y lesiones iatrogénicas por confusiones en los procedimientos quirúrgicos y por anestesia. Universidad Nacional Córdoba. Facultad de Ciencias Médicas. Secretaria de Ciencia y Tecnología 2023-10-19 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.unc.edu.ar/index.php/med/article/view/42773 Revista de la Facultad de Ciencias Médicas de Córdoba.; Vol. 80 (2023): Suplemento JIC XXIV Revista de la Facultad de Ciencias Médicas de Córdoba; Vol. 80 (2023): Suplemento JIC XXIV Revista da Faculdade de Ciências Médicas de Córdoba; v. 80 (2023): Suplemento JIC XXIV 1853-0605 0014-6722 spa https://revistas.unc.edu.ar/index.php/med/article/view/42773/42810 Derechos de autor 2023 Universidad Nacional de Córdoba http://creativecommons.org/licenses/by-nc/4.0