Muscle
Rhomboid minor
Small retractor at the root of the scapular spine
High-yield
The two rhomboids share a dorsal scapular nerve supply. Minor attaches at the spine's root; major attaches below it.
Overview
Just above rhomboid major, this muscle reaches the medial scapula near the root of its spine. It helps pull the blade toward the vertebral column and coordinate its downward rotation.
Reference facts
- Origin
- Lower nuchal ligament and spinous processes of C7–T1
- Insertion
- Medial scapular border at the root of the scapular spine
- Action
- Retracts the scapula and assists its elevation and downward rotation
- Innervation
- Dorsal scapular nerve, mainly C5, sometimes with C4 contribution
- Blood supply
- Branches of the dorsal scapular artery
Clinical correlation
A dorsal scapular nerve injury can weaken both rhomboids. Retraction may remain possible because trapezius and other scapular muscles also contribute.
Frequently asked questions
What does the rhomboid minor do?
The rhomboid minor retracts the scapula and assists its elevation and downward rotation.
What nerve innervates the rhomboid minor?
The rhomboid minor is innervated by the dorsal scapular nerve, mainly C5, sometimes with C4 contribution.
Where does the rhomboid minor attach?
Origin: Lower nuchal ligament and spinous processes of C7–T1. Insertion: Medial scapular border at the root of the scapular spine.
What is the blood supply of the rhomboid minor?
Branches of the dorsal scapular artery.