Rhomboid major 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.

Rhomboid major
Image:Rhomboideus major.png
Muscles connecting the upper extremity to the vertebral column. (Rhomboideus major visible at upper center right, near shoulder.)
Latin	musculus rhomboideus major
Gray's	subject #121 434
Origin:	spinous processes of the T2 to T5 vertebrae
Insertion:	medial border of the scapula, inferior to the insertion of rhomboid minor muscle
Artery:	dorsal scapular artery
Nerve:	dorsal scapular nerve (C4 and C5)
Action:	Retracts the scapula and rotates it to depress the glenoid cavity. It also fixes the scapula to the thoracic wall.
Antagonist:	Serratus anterior muscle
Dorlands/Elsevier	m_22/12550536

The rhomboid major is a muscle on the back that connects the scapula with the vertebrae of the spinal column.

Contents 1 Structure 2 Innervation 3 Actions 4 Additional images 5 See also 6 External links

Structure

The rhomboid major arises from the spinous processes of the thoracic vertebrae T2 to T5 as well as the supraspinous ligament. It inserts on the medial border of the scapula, from about the level of the scapular spine to the scapula's inferior angle.

The rhomboid major is considered a superficial back muscle. It is deep to the trapezius, and is located directly inferior to the rhomboid minor. As the word rhomboid suggests, the rhomboid major is diamond-shaped. The major in its name indicates that it is the larger of the two rhomboids.

Innervation

The rhomboid major, like the rhomboid minor, is innervated by the dorsal scapular nerve (C5).

Actions

The rhomboid major helps to hold the scapula (and thus the upper limb) onto the ribcage. It also acts to retract the scapula, pulling it towards the vertebral column.

Additional images

Left scapula. Dorsal surface.

The scapular and circumflex arteries.

Surface anatomy of the back.

See also

• Rhomboid minor
• Trapezius
• Latissimus dorsi
• Levator scapulae

External links

• LUC rhmj
• UWASH rhomboids
• 188022862 at GPnotebook

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

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 rhomboideus majorhe:השרירים המעוינים

id:Otot rhomboideus major hu:Nagy rombuszizomsv:Rhomboideus major