Adductor Pollicis - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The adductor pollicis is an intrinsic muscle of the hand. It is a triangular shape with two heads. The radial artery passes anteriorly through the space between the two heads to form the deep palmar arch. Attachments: One head originates from the third metacarpal. The other head originates from the capitate and adjacent areas of second and third metacarpal. Both heads attach onto the base of the proximal phalanx of the thumb. Actions: Adduction of the thumb. Innervation: Ulnar nerve. Blood Supply: Deep palmar arch. By TeachMeSeries Ltd (2026) Fig 1The adductor pollicis. Note the two heads of the muscle. 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. The deep branch of the ulnar nerve innervates the majority of the muscles of the hand (except the lateral two lumbricals and the thenar eminence). Note the two-headed structure of the adductor pollicis. Prosection of the deeper structures of the hand. The deep branch of the ulnar nerve innervates the majority of the muscles of the hand (except the lateral two lumbricals and the thenar eminence). Note the two-headed structure of the adductor pollicis. 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 adductor pollicis muscle? The adductor pollicis is an intrinsic muscle located in the hand, characterised by its triangular shape and composed of two distinct heads. It plays a crucial role in the movement of the thumb. What are the attachments of the adductor pollicis? The adductor pollicis has two heads; one originates from the third metacarpal, while the other arises from the capitate and adjacent areas of the second and third metacarpals. Both heads insert at the base of the proximal phalanx of the thumb. What is the primary action of the adductor pollicis? The main action of the adductor pollicis is the adduction of the thumb, enabling it to move towards the palm. This function is essential for grasping and pinching movements. Which nerve innervates the adductor pollicis? The adductor pollicis is innervated by the ulnar nerve, which supplies the muscle with the necessary signals for contraction. This innervation is vital for the muscle's proper function. What is the blood supply for the adductor pollicis? The blood supply to the adductor pollicis is primarily provided by the deep palmar arch, which ensures the muscle receives adequate oxygen and nutrients for its activity. This vascular support is crucial for muscle health and function. Rate This Article