Muscle Atlas
Extensor Pollicis Longus
Origin: Posterior surface of middle 1/3 of ulna and interosseous membrane
Insertion: Base of distal phalanx of thumb
Action: Extends distal phalanx of thumb at carpometacarpal and interphalangeal joints
Innervation: Posterior interosseous nerve (C7 and C8), the continuation of the deep branch of the radial nerve
Arterial Supply: Posterior interosseous artery
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.
Insertion: Base of distal phalanx of thumb
Action: Extends distal phalanx of thumb at carpometacarpal and interphalangeal joints
Innervation: Posterior interosseous nerve (C7 and C8), the continuation of the deep branch of the radial nerve
Arterial Supply: Posterior interosseous artery
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.