Structure.
- Origin: lateral epicondyle of humerus, and posterior border of ulna.
- Insertion: fifth metacarpal.
Function.
- Concentric action: extends and adducts hand (ulnar deviation) at wrist joint. Lesser: elbow extension, pronation.
- Reverse mover action: wrist extension, ulnar deviation, elbow extension, pronation, lateral rotation at shoulder joint.
- Eccentric action: controls/restrains/slows wrist flexion, radial deviation, elbow flexion, supination.
- Isometric action: stabilize wrist and elbow.
- Innervation: deep radial nerve.
- Arterial supply: posterior interosseus artery.
Clinical Significance.
Extensor carpi ulnaris. Used with permission by 3D4Medical.
References
Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.
Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.
Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.
Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.
