Palmaris Longus - Podcast Version TeachMeAnatomy 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The palmaris longus is a muscle within the superficial compartment of the anterior forearm. It is absent in approximately 15% of the population. Attachments: Originates from the medial epicondyle of the humerus. It attaches to the flexor retinaculum and palmar aponeurosis of the hand. Actions: Flexion (weak) at the wrist. Innervation: Median nerve. Blood supply: Ulnar artery. By TeachMeSeries Ltd (2025) Fig 1The superficial muscles of the anterior forearm. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Rate This Article