Morphologic Aspects of Abductor digiti minimi Muscle in the Hand

It is cited at the anatomical literature that the Abductor digiti minimi muscle can be composed by one or more muscular beams (Williams et al., 1995; Murata et al., 2004), being more found presenting only one beam, as described by Testut (1911) and schematized in pictures by other authors (Grant, 1948; Testut & Latarjet, 1959; Gray, 1977; Lockhart et al., 1983; Woodburne, 1984). However, some authors cite the division in two portions as very frequent (Neto et al., 1984; Gardner et al., 1971; Williams et al.; Murata et al.). According to Neto et al. the two muscular beams appear joined, in its proximal insertion on the pisiforme bone, and they are separated in its extension, well delimited, receiving the denomination, suggested by these authors, of lateral muscular beam, the most superficial, and medial muscular beam, the deepest.