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International Journal of Morphology

versión On-line ISSN 0717-9502

Resumen

PACHECO, Juan Pablo  y  OLAVE, Enrique. Distribution of The Deep Branch of the Ulnar Nerve in the Intrinsec Muscles of the Digiti Minimi in Chilean Individuals. Int. J. Morphol. [online]. 2010, vol.28, n.2, pp.583-590. ISSN 0717-9502.  http://dx.doi.org/10.4067/S0717-95022010000200040.

Detailed knowledge of the innervation of the structures of the hand allows the restoration of normal function when dealing with injuries to which are frequently subject. The present study aims to observe the distribution of the deep branch of ulnar nerve in the intrinsic muscles of the digiti minimi, determining the origin of each branch and its point of entry into the muscle belly in a group of Chilean individuals. 23 formalized hands of Chilean individuals belonging to the unit of Anatomy at the Universidad de La Frontera, Chile, Were dissected. Dissection was performed in palmar regions, exposing the hypothenar muscles and the deep branch of ulnar nerve following muscular branches to determine the origin as independent or common trunk and recording the entry point into the muscle.According to the findings we classified the distribution of the deep branch of the ulnar nerve in 4 types: type I, we found 1 independent branch for abductor digiti minimi (ADM) and a common branch in flexor digiti minimi brevis (FDMB) and opponens digiti minimi (ODM) in 43.4%; in type II, a common branch for ADM and independent FDMB and an independent branch for the ODM in 21.7%; in type III, 3 independent branches, one for each muscle of the digiti minimi in 30.4% and a type IV, 2 independent branches, one for the ADM and the other for ODM, highlighting the absence of the FDMB. The knowledge of these patterns and variations is an important contribution for the surgical anatomy of the hand.

Palabras clave : Ulnar nerve; Muscles of the hand; Digiti minimi.

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