Flexor carpi ulnaris muscle

From Wikipedia, the free encyclopedia

Flexor carpi ulnaris
Dorsal (left) and ventral (right) views of deep muscles of the forearm. FCU is visible in blue.
Latin	musculus flexor carpi ulnaris
Gray's	subject #125 447
Origin:	medial epicondyle (common flexor tendon)
Insertion:	5th metacarpal of the hand
Artery:	ulnar artery
Nerve:	muscular branches of ulnar nerve
Action:	flexion of wrist
Antagonist:	Extensor carpi ulnaris muscle
Dorlands/Elsevier	m_22/12549030

In anatomy, flexor carpi ulnaris muscle (FCU) is a muscle of the human forearm that acts to flex and adduct the hand.

Contents 1 Origin and insertion 2 Tendon 3 Additional images 4 External links

[edit] Origin and insertion

Flexor carpi ulnaris muscle arises by two heads - humeral and ulnar, connected by a tendinous arch beneath which the ulnar nerve and ulnar artery pass.

• The humeral head arises from the medial epicondyle of the humerus by the common flexor tendon.
• The ulnar head arises from the medial margin of the olecranon of the ulna and from the upper two-thirds of the dorsal border of the ulna by an aponeurosis.

Its insertion is into the pisiform bone and then via ligaments into the hamate bone and 5th metacarpal bone, acting to flex and adduct the wrist joint.

[edit] Tendon

The tendon of flexor carpi ulnaris can be seen on the anterior of the distal forearm. On a person's distal forearm, right before the wrist, they will see either two or three tendons. Flexor carpi ulnaris is the most medial (closest to the little finger) of these. (The most lateral one is flexor carpi radialis muscle, and the middle one, if it exists, is palmaris longus.)

[edit] Additional images

Left humerus. Posterior view.	Bones of left forearm. Posterior aspect.	Bones of the left hand. Volar surface.	Front of the left forearm. Superficial muscles.
Cross-section through the middle of the forearm.	Posterior surface of the forearm. Deep muscles.	Transverse section across distal ends of radius and ulna.	The mucous sheaths of the tendons on the front of the wrist and digits.
The muscles of the left hand. Palmar surface.	The radial and ulnar arteries.	Ulnar and radial arteries. Deep view.	Front of right upper extremity.

[edit] External links

• UWASH flexorcarpiulnaris
• LUC fcu

v • d • e Muscles of upper limbs

VERTEBRAL COLUMN: trapezius - latissimus dorsi - rhomboid major - rhomboid minor - levator scapulae ANTERIOR AND LATERAL THORACIC WALLS: pectoralis major - pectoralis minor - subclavius - serratus anterior SHOULDER: deltoid - rotator cuff (supraspinatus, infraspinatus, teres minor, subscapularis) - teres major ARM: anterior compartment: coracobrachialis - biceps brachii - brachialis posterior compartment: triceps brachii - anconeus FOREARM: anterior compartment super. - pronator teres - palmaris longus - flexor carpi radialis - flexor carpi ulnaris - flexor digitorum superficialis deep - pronator quadratus - flexor digitorum profundus - flexor pollicis longus posterior compartment super. - mobile wad (brachioradialis, extensor carpi radialis longus and brevis) - extensor digitorum, - extensor digiti minimi - extensor carpi ulnaris deep - supinator - anatomical snuff box (abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus) - extensor indicis HAND: Lateral volar - abductor pollicis brevis - thenar (opponens pollicis, flexor pollicis brevis, adductor pollicis) Medial volar - palmaris brevis - hypothenar (abductor minimi digiti, flexor digiti minimi brevis, opponens digiti minimi) Intermediate - lumbrical - dorsal interossei - palmar interossei