The rhomboid major is a skeletal muscle of the back that connects the scapula with the vertebrae of the spinal column.
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.
Structure
Origin
The rhomboid major arises from the spinous processes of the thoracic vertebrae T2–T5 as well as the supraspinous ligament.
thumb|right|300px|Rhomboideus major muscle
Innervation
thumb|left|The scapular and circumflex arteries. Rhomboid major labelled at lower left.
The rhomboid major, like the rhomboid minor, is innervated by the ventral primary ramus via the dorsal scapular nerve (C5).
Relations
The rhomboid major is considered a superficial back muscle. It is deep to the trapezius, and situated directly inferior to the rhomboid minor.
Variation
The two rhomboids are sometimes fused into a single muscle.
Additional images
See also
Triangle of auscultation
References
External links
- Video: Anatomy, Function & Dysfunction Rhomboid Muscles
- Dissection video: Superficial Back Review showing the rhomboids with the neurovascular unit
- Rhomboids at ExRx.net