Flexor Carpi Ulnaris
Forearm & Wrist
The only anterior forearm muscle mainly innervated by the ulnar nerve — weakness here is a key sign of ulnar nerve injury at the elbow (cubital tunnel syndrome).
Function
Flexes and adducts wrist
Origin
Medial epicondyle, olecranon, posterior ulna
Insertion
Pisiform, hook of hamate, base of fifth metacarpal
Innervation
Ulnar nerve (C7-T1)