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International Journal of Morphology

versión On-line ISSN 0717-9502


OLAVE, Enrique  y  DEL SOL, Mariano. The Unar Nerve Distribution: Innervation of the Interossei, Lumbricals and Pollicis Adductor Muscles. Int. J. Morphol. [online]. 2008, vol.26, n.4, pp.959-962. ISSN 0717-9502.

The knowledge of hand anatomy is very important for give an exact diagnostic as too in the recovery of the functions after damages in this part of the upper limb. With the purpose to obtain details about this thema, we studied the distribution of the deep branch of the ulnar nerve (DBUN) in the palmar and dorsal interossei (PIm, DIm), lumbricals (Lm) and adductor pollicis (APm) muscles.Ten dissections of formolized cadaveric hands were performed under loupe magnification, all adults, of male sex. The nerves observation was made of medial towards lateral. The first branch observed was for Lm4 and PIm3, disposition found in 9 cases. The Lm3 received a branch that too innervated to the PIm2, in 7 cases. TheDIm4,DIm3 and DIm2 muscles received only one branch in 8, 7 and 7 cases, respectively The branch or branches fortheDIml originated from the terminal división of DBUN, receiving only one branch in 3 cases and two in the rest of the cases. The oblique head of the APm received only one branch in 7 cases and two, three and four branches in 3 cases; the transverse head of theAPm received one branch in 9 cases. The external diameter of DBUN before to give the described branches was 2.5 mm; after the DIm3 origin was 1.5 mm andits terminal branch was 0.95 mm. These results are a complement to the knowledge of the hand innervation and the surgical procedures in this región.

Palabras clave : Hand; Ulnar nerve; Muscular branches.

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