Posterior Perspective Of The Superior Serratus Muscle

Description

Running deep to the superficial scapular retractors, the serratus posterior superior fans inferolaterally from the nuchal ligament and spinous processes of C7 to T3 toward the posterior aspects of ribs 2 through 5. A posterior perspective also brings the vertebral column into view, with thoracic spinous processes centered in the midline and the ribs curving laterally to form the posterior thoracic cage. Medial borders of the scapulae sit lateral to the spine, with rhomboid minor and rhomboid major spanning from the thoracic vertebrae to the scapular medial border, partially overlapping the superior serratus in the upper intercostal region. Fiber direction matters. This angle supports teaching the layered anatomy encountered when reflecting trapezius and rhomboids during a posterior approach to the upper thorax and medial scapular border. Serratus posterior superior is often discussed as an accessory muscle of respiration because of its attachments to ribs 2 to 5, but in practice it is also a frequent source of confusion in myofascial pain mapping, where deep paraspinal and periscapular tenderness can be misattributed to the rhomboids or levator scapulae. Clear separation of these planes helps when correlating physical exam findings with targeted injections or dry needling around the medial scapular region. Ideal for gross anatomy lab guides, musculoskeletal courses covering the posterior thoracic wall, and atlas plates illustrating scapulothoracic relationships and deep back layering. It also fits clinical education materials on posterior thoracic pain, scapular dyskinesis, and safe needle trajectories around the medial border of the scapula. Anatomical accuracy verified by SciePro's Medical Advisory Board.