Flexor digitorum profundus muscle

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Flexor digitorum profundus muscle
Ventral view of the deep muscles of the forearm. FDP is shown in blue.
Latin	musculus flexor digitorum profundus
Gray's	subject #125 448
Origin	ulna
Insertion	distal phalanges
Artery:	anterior interosseous artery
Nerve:	median (anterior interosseous), muscular branches of ulnar
Action:	flex hand, interphalangeal joints
Antagonist:	Extensor digitorum muscle
Dorlands /Elsevier	m_22/12549089

In human anatomy, the flexor digitorum profundus is a muscle in the forearm that flexes the fingers. It is considered to be an extrinsic muscle because its action is at a different location than the main body of the muscle.

Flexor digitorum profundus, along with flexor digitorum superficialis have long tendons that run down the arm and through the carpal tunnel and attach to the palmar side of the phalanges of the fingers. This muscle originates from the anterior side of the ulna.

Flexor digitorum profundus lies deep to superficialis, but it attaches more distally. To get around this problem profundus's tendons go through the tendons of superficialis, and end up attaching to the distal phalanx.

[edit] Innervation

Flexor digitorum profundus is innervated by the median and ulnar nerves.

• The medial aspect of the muscle (which flexes the 4th and 5th digit) is supplied by the ulnar nerve (C8, T1)
• The lateral aspect (which flexes the 2nd and 3rd digit) by the median nerve (via its anterior interosseous branch) (C8, T1).

It is one of two flexor muscles that is not exclusively supplied by the median nerve (the other is flexor carpi ulnaris).

[edit] Additional images

Bones of left forearm. Anterior aspect.	Bones of left forearm. Posterior aspect.	Bones of the left hand. Volar surface.	Front of the left forearm. Deep 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.	Transverse section across the wrist and digits.
The mucous sheaths of the tendons on the front of the wrist and digits.	Ulnar and radial arteries. Deep view.	Tendons of forefinger and vincula tendina. (Flexor digitorum profundus labeled at bottom right.)

[edit] External links

• LUC fdp
• UWASH flexordigprofundus

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)