Rhomboid major muscle

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The rhomboid major muscle is a skeletal muscle located in the upper back. It is part of the muscular system and plays a crucial role in the movement and stabilization of the scapula.

Anatomy

The rhomboid major muscle originates from the spinous processes of the T2 to T5 vertebrae. It inserts into the medial border of scapula, extending from the level of the spine of scapula to the inferior angle of scapula.

Innervation

The muscle is innervated by the dorsal scapular nerve, which arises from the brachial plexus, specifically from the C4 and C5 nerve roots.

Blood Supply

The blood supply to the rhomboid major muscle is provided by the dorsal scapular artery.

Function

The primary function of the rhomboid major muscle is to retract the scapula and rotate it to depress the glenoid cavity. Additionally, it helps to fix the scapula to the thoracic wall, providing stability during upper limb movements.

Antagonist

The serratus anterior muscle acts as the antagonist to the rhomboid major muscle.

See Also

• Rhomboid minor muscle
• Trapezius muscle
• Levator scapulae muscle
• Muscular system
• Scapula