Extensor Digitorum Muscle
Extensor Carpi Ulnaris – Attachments, Action & Innervation
Extensor carpi ulnaris is one of the muscles that comprise the superficial part of the posterior forearm compartment.
Extensor Carpi Ulnaris
Attachments of the Extensor Carpi Ulnaris Muscle: Origin and Insertion
Origin (proximal attachment)
a. Lateral epicondyle of humerus.
Insertion (distal attachment)
a. Base of 5th metacarpal (dorsal surface).
Actions of the Extensor Carpi Ulnaris Muscle:
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b. Ulnar deviates (adducts) hand at the wrist.
Nerve to the Extensor Carpi Ulnaris muscle and its spinal segment:
a. Radial nerve (C6-C8).
An overview of the posterior forearm muscles
Test yourself while observing the Extensor Carpi Ulnaris muscle