Duplicated Palmaris Longus Muscle With Insertion Onto The Transverse Carpal Ligament: A Case Report

Abstract

The palmaris longus muscle is one of the most anatomically variable muscles in the human body, with incidence ranging from 0-63.9%.  While these anatomical variations are typically benign, they are of clinical importance as they can contribute to neurovascular and biomechanical dysfunction.  We report here a duplicated palmaris longus muscle with an insertion onto the transverse carpal ligament found during cadaveric dissection in a graduate anatomy course for physical and occupational therapy students.