Muscle Atlas

Interosseous Muscles, Palmar

Origin: Palmar 1 - 3: Palmar surfaces of 2nd, 4th and 5th metacarpals (unipennate muscles)
Insertion: Palmar 1 - 3: Extensor expansions of digits and bases of proximal phalanges of digits 2, 4 and 5
Action: Palmar 1 - 3: Adduct digits toward axial line and assist lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints
Innervation: Deep branch of ulnar nerve (C8 and T1)
Arterial Supply: Palmar 1 - 3: Palmar metacarpal arteries

The medical illustrations contained in this online atlas are copyrighted © 1997 by the University of Washington. They may not be utilized, reproduced, stored, or transmitted in any form or by any means, electronic or mechanical, or by any information storage or retrieval system, without permission in writing from the University of Washington.

Receiving a license to use these images is generally quite easy, particularly for academic and scholarly purposes. For more information see the Musculoskeletal Atlas Express Licensing Page.

Back to the Muscle Atlas