Flexor carpi ulnaris muscle

You don't need to be Editor-In-Chief to add or edit content to WikiDoc. You can begin to add to or edit text on this WikiDoc page by clicking on the edit button at the top of this page. Next enter or edit the information that you would like to appear here. Once you are done editing, scroll down and click the Save page button at the bottom of the page.

Flexor carpi ulnaris
Image:FCU.png
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:	pisiform
Artery:	ulnar artery
Nerve:	muscular branches of ulnar nerve
Action:	flexion of wrist
Antagonist:	Extensor carpi ulnaris muscle
Dorlands/Elsevier	m_22/12549030

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

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.

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.)

Exercises

The muscle, like all flexors of the forearm, can be strengthened by exercises that resist its flexion. A wrist roller can be used and wrist curls with dumbbells can also be performed.

Additional images

Bones of left forearm. Posterior aspect.

Bones of the left hand. Volar surface showing its insertion into the pisiform bone and then via ligaments into the hamate bone and 5th metacarpal bone, acting to flex and adduct the wrist joint.

Cross-section through the middle of the forearm.

Front of right upper extremity.

External links

• UWASH flexorcarpiulnaris
• LUC fcu

v • d • e List of muscles of upper limbs
VERTEBRAL COLUMN	trapezius - latissimus dorsi - rhomboid (major, minor) - levator scapulae
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: superf. - pronator teres - palmaris longus - flexor carpi radialis - flexor carpi ulnaris - flexor digitorum superficialis anterior compartment: deep - pronator quadratus - flexor digitorum profundus - flexor pollicis longus posterior compartment: superf. - mobile wad (brachioradialis, extensor carpi radialis longus and brevis) - extensor digitorum, - extensor digiti minimi - extensor carpi ulnaris posterior compartment: deep - supinator - anatomical snuff box (abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus) - extensor indicis
HAND	lateral volar - thenar (opponens pollicis, flexor pollicis brevis, abductor pollicis brevis) - adductor pollicis medial volar - hypothenar (opponens digiti minimi, flexor digiti minimi brevis, abductor minimi digiti) - palmaris brevis intermediate - lumbrical - interossei (dorsal, palmar)

de:Musculus flexor carpi ulnarisid:Otot flexor carpi ulnaris

hu:Singcsonti csuklóhajlító izom