Rhomboid major
From Ganfyd
Rhomboid major (rhomboideus major) is a muscle located on the back that acts on the shoulder girdle.
| Rhomboid major | |
|---|---|
 The rhomboid muscles | |
| System: | Muscle |
| Function: | Retracts the scapula |
| Origin: | Spines of T2-T5 and supraspinous ligaments |
| Branches: | |
| Insertion: | Lower posteromedial border of scapula |
| Arterial supply: | |
| Venous drainage: | |
| Lymphatic drainage: | |
| Innervation: | Dorsal scapular nerve (C5) |
| Vertebral levels: | |
| Search for Rhomboideus major in Gray's. | |
Contents |
Actions
- Retracts the scapula
Joints Affected
Origin
- Spine of T2
- Spine of T3
- Spine of T4
- Spine of T5
- Supraspinous ligaments
Insertion
- A narrow area above the lower part of the root of the spine of the scapula, the lower postermedial border of the scapula below this down to the inferior angle
Nerve Supply
Relations
- Rhomboid minor (superiorly)
Variations
- Both scapular and vertebral attachments vary in extent
- May attach to the scapula through a tendinous arch or via direct attachment of muscle fibres
