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International Journal of Morphology
versión On-line ISSN 0717-9502
MAS, Nuket; PELIN, Can; ZAGYAPAN, Ragiba y BAHAR, Hakan. Unusual Relation of the Median Nerve with the Accessory Head of the Biceps Brachii Muscle: An Original Case Report . Int. J. Morphol. [online]. 2006, vol.24, n.4, pp.561-564. ISSN 0717-9502. http://dx.doi.org/10.4067/S0717-95022006000500007.
During the laboratory dissection of the brachial region and the arm, an abnormal relation of median nerve with the accessory head of biceps brachii muscle has been observed unilaterally on the right upper limb of a male cadaver. Whereas the short and long heads have their normal origin, additional-excess third head originated from the anteromedial surface of the superior part of the humerus. Some fibers of this accessory head on the medial side arise from the deep fascia surrounding the brachialis muscle. The fibers then cross the median nerve superficially before joining the third head which has inserted into a common tendon together with the long and short heads. To have information of such variations is of importance either for anatomists or clinicians especially for plastic surgeons in flap surgery
Palabras clave : Biceps brachii muscle; Accessory head; Median nerve; Anatomical variations.