Rhomboids

Origin, Insertion, Action, Innervation

Rhomboid minor:
Origin: Spinous processes of C7–T1, lower portion of the nuchal ligament
Insertion: Medial border of the scapula at the root of the spine of the scapula

Rhomboid major:
Origin: Spinous processes of T2–T5
Insertion: Medial border of the scapula (between the spine of the scapula and the inferior angle)

Action (both):
Primary: Retraction (adduction) of the scapula
Downward rotation of the scapula
Elevation of the scapula (minor role)
Stabilization of the scapula against the thoracic wall
Innervation (both): Dorsal scapular nerve (C5)

Palpation Guide

Client position: Prone with the arm hanging off the table, or seated.
Landmark sequence:

Locate the medial border of the scapula. The rhomboids run from the thoracic spinous processes to this border, deep to the middle and lower trapezius.
Place your fingers between the medial scapular border and the spinous processes of T2–T5. The rhomboid fibers run obliquely — from the spinous processes inferolaterally to the medial scapular border.
Rhomboid minor is superior and smaller, attaching at the root of the scapular spine. Rhomboid major is below it, attaching along the rest of the medial border down to the inferior angle.
To enhance access, ask the client to reach across the body (horizontally adduct) with the ipsilateral arm — this protracts the scapula and widens the space between the scapula and the spine, making the rhomboids more accessible.

Tissue feel: Deep to the trapezius, the rhomboids feel like firm, flat bands running obliquely from the spine to the scapula. In a hypertonic state, taut bands are palpable along the medial scapular border. In an inhibited state (common in upper crossed syndrome), they feel soft and thin.
Confirmation test: Ask the client to retract the scapula (squeeze shoulder blades together) with the arm at the side while you palpate between the scapula and the spine. You will feel the rhomboids contract. To distinguish from middle trapezius, note that rhomboids downwardly rotate while retracting — ask the client to retract while putting the hand behind the back (downward rotation bias).
Common errors:
Confusing rhomboids with middle trapezius — both are scapular retractors occupying the same space. Middle trapezius is superficial; rhomboids are deep. Resisted retraction with the arm at the side activates both.
Missing rhomboid minor — it is small and lies at the root of the scapular spine, often overshadowed by the larger rhomboid major below.
Attributing all interscapular pain to the rhomboids — middle trapezius TrPs produce a nearly identical pain pattern in the same region.

Trigger Point Referral

Common TrP locations: TrPs are found along the medial scapular border, particularly at the midpoint of the rhomboid major (approximately T3–T4 level) between the spine and the scapula.
Referral pattern: Refers locally to the medial scapular border and the interscapular region. The referral is superficial and well-localized — a burning or aching sensation between the shoulder blades.
Clinical significance: Interscapular pain is the most common complaint in desk workers. The burning "between the shoulder blades" is almost always a combination of middle trapezius and rhomboid TrPs. If middle trapezius treatment alone does not resolve it, check the deeper rhomboid layer.

Trigger point referral diagram — coming soon

Image coming soon. For visual reference, see [Rhomboids at TriggerPoints.net](http://www.triggerpoints.net/muscle/rhomboid).

Clinical Notes

Innervation significance:

The dorsal scapular nerve (C5) innervates both the rhomboids and the levator scapulae. The nerve passes through or behind the middle scalene before running down the deep surface of the rhomboids. Dorsal scapular nerve entrapment (by the middle scalene or by the rhomboids themselves) can produce medial scapular border pain and rhomboid weakness.

Common conditions:

Contribute to the interscapular pain component of conditions/upper-crossed-syndrome. Paradoxically, the rhomboids may be either overstretched (in protracted scapulae) or hypertonic (guarding against protraction). The clinical context determines the treatment approach.
Rhomboid strain from overuse in rowing, pulling, or retraction-heavy exercises.
Dorsal scapular nerve entrapment produces a deep, burning medial scapular border pain that does not resolve with standard TrP treatment — this requires investigation of the nerve's course through the middle scalene.

What you'll typically find:

In clients with protracted scapulae (upper crossed syndrome), the rhomboids are in a lengthened, eccentrically loaded position. They develop TrPs from being chronically overstretched, not from being shortened. This is important — stretching the rhomboids in this population is counterproductive.
In clients who perform heavy retraction work (rowing, pull-ups), the rhomboids may be hypertonic and shortened, pulling the scapulae into excessive retraction.
Palpation along the medial scapular border between the scapula and the spine typically reveals multiple tender points. The burning quality of the referral is characteristic.

Treatment effects:

Sustained compression along the medial scapular border targets rhomboid TrPs. Sink through the overlying trapezius to reach the deeper rhomboid layer.
Cross-fiber friction perpendicular to the oblique fiber direction is effective.
In the protracted-scapula population, TrP release should be combined with scapular retraction strengthening. If the scapulae continue to protract (because the pectorals remain tight), the rhomboids will redevelop TrPs.

Cautions:

The thoracic spinous processes are directly beneath the medial attachment — avoid excessive pressure directed toward the spine, particularly in clients with osteoporosis.
The dorsal scapular nerve runs on the deep surface of the rhomboids — deep sustained pressure along the course of the nerve may compress it.
Distinguish musculoskeletal interscapular pain from referred visceral pain — interscapular pain can be referred from the gallbladder (right side), heart (left side), or thoracic aorta.

Postural significance:

The rhomboids are downward rotators of the scapula. In upper crossed syndrome, they are in a lengthened position due to scapular protraction, but they also contribute to downward rotation alongside the levator scapulae and pectoralis minor. The ideal rehabilitation approach strengthens the rhomboids for retraction while also strengthening the upward rotators (serratus anterior, lower trapezius) to balance the rotational forces.

Clinical pearl:

If a client reports burning interscapular pain that worsens with prolonged sitting and does not respond to rhomboid and middle trapezius TrP treatment, investigate dorsal scapular nerve entrapment. The nerve passes through or behind the middle scalene — release the middle scalene and re-assess. This is one of the most commonly missed causes of persistent medial scapular border pain.

Assessment

Manual muscle testing:

Scapular retraction with downward rotation: Client prone with the hand placed on the lower back (internal rotation and extension). Ask the client to lift the elbow toward the ceiling. Apply downward resistance. This biases the rhomboids over the middle trapezius (which retracts without downward rotation).

Stretch test:

Scapular protraction (cross-body reach): Client seated. Ask the client to reach across the body (horizontal adduction) to maximally protract the scapula. Restriction in protraction suggests shortened rhomboids — though this is uncommon in the typical desk-worker population.

Related special orthopedic tests:

Scapular dyskinesis observation — altered scapular movement during arm elevation
Lateral scapular slide test — distance from spinous process to medial scapular border

Muscle Groups

Scapular retractors (functional):

anatomy/muscles/middle-trapezius
Rhomboids (this article)

Scapular downward rotators (functional):

Dorsal scapular nerve group (innervation):

anatomy/muscles/levator-scapulae
Rhomboids (this article)

Related Muscles

Synergists for scapular retraction:

anatomy/muscles/middle-trapezius — primary scapular retractor; lies superficial to the rhomboids

Antagonists:

anatomy/muscles/serratus-anterior — primary scapular protractor
anatomy/muscles/pectoralis-minor — protracts and anteriorly tilts the scapula

Same innervation (dorsal scapular nerve):

anatomy/muscles/levator-scapulae — shares C5 dorsal scapular nerve; elevates and downwardly rotates

Key Takeaways

Interscapular burning in desk workers is almost always a combination of rhomboid and middle trapezius TrPs — treat both layers.
In protracted scapulae, rhomboids are overstretched and eccentrically loaded — stretching them is counterproductive; strengthen retraction and release the pectorals.
Persistent medial scapular border pain that does not respond to TrP treatment suggests dorsal scapular nerve entrapment — investigate the middle scalene.