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International Journal of Morphology

On-line version ISSN 0717-9502

Abstract

TORREZ, J. C  and  OLAVE, E. Biometric and Morphometric Parameters of the Terminal End of the Median Nerve, Superficial Branch of the Ulnar Nerve and Common Palmar Digital Nerves in the Human Hand. Int. J. Morphol. [online]. 2008, vol.26, n.3, pp.675-679. ISSN 0717-9502.  http://dx.doi.org/10.4067/S0717-95022008000300027.

It is necessary to know the distribution of the nerves in the hand in order to make a suitable diagnosis of the injuries that affect it and to effectively implement recovery or reconstructions. Based on this premise, a biomorphometric study was conducted on the terminal end of the median nerve (MN), the superficial branch of the ulnar nerve (SBUN) and the common digital palmar nerves (CDPN). 12 hands of adult cadavers Chileans housed in the Anatomy Laboratones in the Faculty of Medicine at the University de La Frontera, Chile were used for this purpose. 5 hands were dissected by conventional means and registered morphometricaily, from which samples were taken and treated using the appropriate histological techniques. The average distance between the distal wrist crease and the división of the MN, and between the same crease and the división for the SBUN was 35.5 and 26.1 mm, respectively; the average distances between the crease mentioned and the división of CDPN I, II, III and IV were 43.5, 68.1, 72.6 and 66.1 mm, respectively. The average external diameters of these latter nerves were 3.25, 1.92, 2.24 and 1.73, respectively. The average number fascicles prior to división was 30 from the MN, 16.8 from the SBUN, 11.8 from the CDPN I, 15.4 from CDPN II, 14.6 from CDPN III and 12.4 from CDPN IV. The average number of fibers prior to división was 22565 from the MN, 8835 from the SBUN; 4859 from the CDPN I, 5767 from the CDPN II, 5233 from the CDPN III and 3606 from the CDPN IV. These results will provide new support for clinicians, surgeons and anatomists, complementing the topic of innervation of the hand.

Keywords : Anatomy; Hand; Median nerve; Ulnar nerve; Common digital palmar nerves.

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