Muscles / Forearms
Extensor carpi ulnaris
- Forearms
- Forearm & wrist
- Superficial layer
Also called ECU.
Anatomy
- Origin
- Lateral epicondyle of the humerus and posterior border of the ulna
- Insertion
- Dorsal base of the 5th metacarpal
- Nerve
- Posterior interosseous nerve (radial) (C7-C8)
Actions
- Extends and adducts (ulnar deviates) the wrist
Exercises that train it most
Also trained by
Notes
- ECU tendon subluxation and tendinopathy cause ulnar-sided wrist pain.
References (4)
- Standring S, ed. Elsevier. Gray's Anatomy: The Anatomical Basis of Clinical Practice. 42nd ed.
- Dalley AF, Agur AMR. Wolters Kluwer. Moore's Clinically Oriented Anatomy. 9th ed.
- Neumann DA. Elsevier. Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation. 3rd ed.
- Betts JG, Young KA, Wise JA, et al. OpenStax (free, openly licensed textbook). Anatomy and Physiology 2e