Bitendinous Palmaris Longus Muscle: A Case Report

摘要

Palmaris Longus Muscle (PLM) is one of the common flexor muscles of the forearm. Classified as a phylogenetically retrogressive muscle, it often exhibits anatomic variations such as agenesis and variation in location, morphology and attachment. A Bitendinous PLM was identified in a female cadaver on the left side; the tendon of insertion bifurcated into lateral and medial tendons and inserted into the base of the Thenar eminence and Palmar aponeurosis, respectively. The lengths of the muscle and the tendons of insertion, the point of bifurcation and width were measured. PLM tendon is highly valued as an ideal donor for tendon grafts. The knowledge of such a variant will benefit anatomists, hand surgeons, orthopaedicians and plastic surgeons.