Rhomboid Major

Description

Centered on the male posterior thorax, the rhomboid major is highlighted bilaterally as a broad, oblique sheet running from the spinous processes of T2 to T5 toward the medial (vertebral) border of the scapula, inferior to the smaller rhomboid minor. Muscle fibers course inferolaterally, paralleling the rhomboid minor, to insert along the medial border from the level of the scapular spine toward the inferior angle, deep to the trapezius. Surrounding osseous landmarks remain visible, including the cervical and upper thoracic vertebrae, posterior ribs, and both scapulae in anatomical position. Orientation and attachment are clear. Rhomboid major anatomy matters when you are teaching scapulothoracic mechanics and diagnosing medial border pain. Weakness or inhibition often presents as scapular protraction and downward rotation during arm elevation, while focal tenderness at the medial scapular border can mimic cervical radiculopathy or refer from facet joint disease. For surgical and procedural teaching, this view clarifies why the dorsal scapular nerve (C5) and dorsal scapular artery run deep to the levator scapulae and rhomboids and can be irritated by traction, repetitive rowing-type activity, or poorly placed injections along the medial scapular border. Use this plate for gross anatomy and kinesiology courses covering the posterior shoulder girdle, for orthopedic or sports medicine texts discussing scapular dyskinesis, and for rehabilitation handouts illustrating rhomboid strengthening after shoulder impingement or postural syndrome. It also supports procedure education on safe palpation and needle trajectory near the medial scapula in the upper back. Anatomical accuracy verified by SciePro's Medical Advisory Board.