Rhomboid minor
Musculus rhomboideus minor
Also known as: rhomboideus minor
A small, cylindrical muscle above rhomboid major. It runs from the C7–T1 spines to the medial border of the scapula at the root of the spine.
Overview
Rhomboid minor arises from the lower part of the nuchal ligament and the spinous processes of C7 and T1. It inserts on the medial border of the scapula at the level of the smooth triangular area at the root of the scapular spine. It lies between levator scapulae above and rhomboid major below, and the two rhomboids are often separated only by a thin fascial plane. It works with rhomboid major to retract, downwardly rotate and stabilise the scapula, and it is supplied by the same dorsal scapular nerve.
Anatomy
- Origin
Nuchal ligament and the spinous processes of C7–T1.
- Insertion
Medial border of the scapula at the root of the spine.
- Action
Retracts and downwardly rotates the scapula; fixes it to the thoracic wall.
- Innervation
Dorsal scapular nerve.
- Nerve roots
C4–C5
- Arterial supply
Dorsal scapular artery.
Function
- Retracts the scapula
- Downwardly rotates the scapula
- Stabilises the scapula
Compiled from standard anatomy and physiology references — see the Muscular System sources. For education only; not medical advice.