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 Print Article Rate This Article