Palmaris Brevis - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The palmaris brevis is an intrinsic muscle of the hand. It is a small, thin muscle, found superficially in the subcutaneous tissue of the hypothenar eminence. Attachments: Originates from the palmar aponeurosis and flexor retinaculum and attaches to the dermis of the skin on the medial margin of the hand. Actions: Wrinkles the skin of the hypothenar eminence and deepens the curvature of the hand, improving grip. Innervation: Ulnar nerve. Blood Supply: Superficial palmar arch Adobe Stock, Licensed to TeachMeSeries Ltd Fig 1Palmaris brevis. 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 Pro Feature - Dissection Atlas Prosection of the deeper structures of the hand, demonstrating the palmar interossei. The dorsal interossei are also partially visible. Prosection of the deeper structures of the hand, demonstrating the palmar interossei. The dorsal interossei are also partially visible. You've Discovered a Pro Feature Access our Dissection Image Library Enhance your understanding with high-resolution dissection images showcasing real-life anatomy. Learn More Frequent questions What is the palmaris brevis? The palmaris brevis is a small intrinsic muscle located in the hypothenar eminence of the hand. It plays a role in improving grip by wrinkling the skin and deepening the curvature of the hand. Where does the palmaris brevis originate and attach? This muscle originates from the palmar aponeurosis and flexor retinaculum, attaching to the dermis of the skin on the medial side of the hand. Its positioning allows it to influence the skin's texture and grip. What is the primary function of the palmaris brevis? The main function of the palmaris brevis is to wrinkle the skin of the hypothenar eminence, which enhances the hand's grip. This action contributes to the overall dexterity and functionality of the hand. Which nerve innervates the palmaris brevis? The palmaris brevis is innervated by the ulnar nerve. This nerve supply is crucial for the muscle's function and the overall movement of the hand. What is the blood supply to the palmaris brevis? The palmaris brevis receives its blood supply from the superficial palmar arch. This vascularisation ensures that the muscle functions effectively during hand movements. Rate This Article