Anatomy

Origin

Rhomboid Major: Spines of the second to fifth thoracic vertebrae, supraspinous ligament Rhomboid Minor: Spines of the seventh cervical and first thoracic vertebrae, lower part of the ligamentum nuchae

Insertion

Rhomboid Major: Medial border of the scapula below the spine Rhomboid Minor: Medial border of the scapula at the root of the spine

Nerve

Dorsal scapular nerve (C5)

Actions

Rhomboid Major: Retracts and stabilizes scapula, elevates the medial border of the scapula causing downward rotation, assists in adduction of arm Rhomboid Minor: Retracts and stabilizes scapula, elevates the medial border of the scapula, rotates the scapula to depress the lateral angle (assists in adduction of arm)