Anconeus muscle

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Anconeus muscle
Back of right upper extremity. (Anconeus labeled at bottom center.)
Posterior surface of the forearm. Superficial muscles. (Anconeus visible at center right.)
Latin	musculus anconeus
Gray's	subject #125 454
Origin	lateral epicondyle of the humerus proximally
Insertion	lateral surface of the olecranon process and the superior part of the posterior ulna distally
Artery:	deep brachial artery, recurrent interosseous artery
Nerve:	radial nerve (C7, C8, and T1)
Action:	It is partly blended in with the triceps, which it assists in extension of the forearm. It also stabilises the elbow and abducts the ulna during pronation.
Dorlands /Elsevier	m_22/12548375

The anconeus muscle is a small muscle on the posterior aspect of the elbow joint.

Some consider anconeus to be a continuation of the triceps brachii muscle.^[1][2][3] Some sources consider it to be part of the posterior compartment of the arm,^[4] while others consider it part of the posterior compartment of the forearm.^[5]

The Anconeus muscle can easily be palpated just lateral to the olecranon process of the ulna.

Its function is trivial in humans. It assists in extension of the elbow, where the triceps brachii is the principal agonist. It also prevents the elbow joint capsule being pinched in the olecranon fossa during extension of the elbow. Anconeus also abducts the ulna and stabilizes the elbow joint.

[edit] Additional images

Left humerus. Posterior view.	Bones of left forearm. Posterior aspect.	Posterior surface of the forearm. Deep muscles.	Arteries of the back of the forearm and hand.
The suprascapular, axillary, and radial nerves.

[edit] References

1. ^ Williams, P. et al, 1995, Gray's Anatomy, 38th ed., Churchill Livingstone
2. ^ Jones, W. et al.(eds) , 1953, Buchanan's Manual of Anatomy, 8th ed., Balliére, Tindall and Cox., pp. 496
3. ^ Grant, J. & Basmajian J., 1965, Grant's Method of Anatomy, 7th ed., The Williams & Wilkins Company, Baltimore, pp. 163-164
4. ^ Dissector Answers - Axilla & Arm. Retrieved on 2008-01-17.
5. ^ The Radius and Ulna. Retrieved on 2008-01-17.

[edit] External links

• LUC anco
• Anconeus+muscle at eMedicine Dictionary
• PTCentral
• Image at dubinchiro.com

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)