Muscle
Flexor carpi ulnaris
Flexes and adducts the wrist
High-yield
Only anterior forearm muscle innervated by the ULNAR nerve (with medial half of FDP); flexes and adducts wrist.
Overview
The most medial superficial flexor, and the only forearm flexor supplied by the ulnar nerve. Its tendon guards the ulnar nerve and artery at the wrist.
Reference facts
- Origin
- Humeral head: medial epicondyle. Ulnar head: olecranon and posterior border of the ulna
- Insertion
- Pisiform, hook of hamate, and base of the 5th metacarpal
- Action
- Flexes and adducts (ulnarly deviates) the wrist
- Innervation
- Ulnar nerve (C7, C8)
- Blood supply
- Ulnar artery
Frequently asked questions
What does the flexor carpi ulnaris do?
The flexor carpi ulnaris flexes and adducts (ulnarly deviates) the wrist.
What nerve innervates the flexor carpi ulnaris?
The flexor carpi ulnaris is innervated by the ulnar nerve (C7, C8).
Where does the flexor carpi ulnaris attach?
Origin: Humeral head: medial epicondyle. Ulnar head: olecranon and posterior border of the ulna. Insertion: Pisiform, hook of hamate, and base of the 5th metacarpal.
What is the blood supply of the flexor carpi ulnaris?
The flexor carpi ulnaris is supplied by the ulnar artery.