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Incidence of unusual formation of the median nerve in Thai-Northeast embalmed cadavers / Incidencia de la formación inusual del nervio mediano en cadáveres embalsamados del noreste de Tailandia
Namking, Malivalaya; Chaiyamoon, Arada; Chaijaroonkhanarak, Wunnee; Khamanarong, Kimaporn; Woraputtaporn, Worawut; Iamsaard, Sitthichai.
  • Namking, Malivalaya; Khon Kaen University. Faculty of Medicine. Department of Anatomy. Khon Kaen. TH
  • Chaiyamoon, Arada; Khon Kaen University. Faculty of Medicine. Department of Anatomy. Khon Kaen. TH
  • Chaijaroonkhanarak, Wunnee; Khon Kaen University. Faculty of Medicine. Department of Anatomy. Khon Kaen. TH
  • Khamanarong, Kimaporn; Khon Kaen University. Faculty of Medicine. Department of Anatomy. Khon Kaen. TH
  • Woraputtaporn, Worawut; Khon Kaen University. Faculty of Medicine. Department of Anatomy. Khon Kaen. TH
  • Iamsaard, Sitthichai; Khon Kaen University. Faculty of Medicine. Department of Anatomy. Khon Kaen. TH
Int. j. morphol ; 35(1): 52-55, Mar. 2017. ilus
Article in English | LILACS | ID: biblio-840932
ABSTRACT
This study aimed to investigate the incidence of unusual formation of the median nerve in Thai cadavers. Two hundred and ninety-two upper limbs were dissected and observed. The results showed that 5 out of 292 (1.71 %) arms had unusual splitting of median nerve that supplied the flexor arm muscles. Concomitantly, the musculocutaneous nerve was absent. In 4 out of 5 variant arms (80 % or 1.37 % of total upper limbs), each median nerve was unusually formed by 3 roots; the first and second roots were from lateral cord and the third one from medial cord. The union of the second lateral and medial roots to become a median nerve distantly extended in the arm. The second lateral roots gave off small muscular branches to the upper part of flexor arm muscles. Knowledge of such anatomical variations is helpful for surgeons in performing of brachial plexus surgery.
RESUMEN
Este estudio tuvo como objetivo investigar la incidencia en la formación inusual del nervio mediano en cadáveres tailandeses. Se disecaron y observaron 292 miembros superiores. En 5 casos (1,71 %) se presentó una división inusual del nervio mediano que suministraba los nervios para los músculos flexores del brazo. Concomitantemente, el nervio musculocutáneo estaba ausente. En 4 de los 5 casos (80 % o 1,37 % del total de los miembros superiores), cada nervio mediano se formó por 3 raíces; la primera y segunda raíces procedían del fascículo lateral y la tercera del fascículo medial. La unión de la segundas raíces lateral y medial formaban el nervio mediano distalmente en el brazo. Las segundas raíces laterales daban pequeños ramos musculares a la parte superior de los músculos flexores del brazo. El conocimiento de tales variaciones anatómicas es útil para los cirujanos en la realización de la cirugía del plexo braquial.
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Full text: Available Index: LILACS (Americas) Main subject: Upper Extremity / Anatomic Variation / Median Nerve Type of study: Incidence study / Risk factors / Screening study Limits: Humans Country/Region as subject: Asia Language: English Journal: Int. j. morphol Journal subject: Anatomy Year: 2017 Type: Article Affiliation country: Thailand Institution/Affiliation country: Khon Kaen University/TH

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Full text: Available Index: LILACS (Americas) Main subject: Upper Extremity / Anatomic Variation / Median Nerve Type of study: Incidence study / Risk factors / Screening study Limits: Humans Country/Region as subject: Asia Language: English Journal: Int. j. morphol Journal subject: Anatomy Year: 2017 Type: Article Affiliation country: Thailand Institution/Affiliation country: Khon Kaen University/TH