Posterior Perspective of the Shoulder Muscles Beneath the Skin

Description

Posterior surface anatomy of the male shoulder is rendered with the skin reflected to expose the superficial and deep muscle layers of the upper back and scapular region. The trapezius spans from the midline to the spine of the scapula, draping superior to the infraspinatus fossa, while the posterior deltoid forms the lateral shoulder cap over the acromion and proximal humerus. Inferior to the scapular spine, the infraspinatus occupies the infraspinous fossa and converges laterally toward the greater tubercle, with teres minor (superior) and teres major (inferior) forming the posterior axillary fold at the lateral border of the scapula. Fibers of latissimus dorsi sweep superolaterally from the lower trunk into the humerus, passing inferior to teres major. Posterior views like this clarify how the rotator cuff relates to the scapula and proximal humerus, a frequent blind spot when learners only see anterior diagrams of the glenohumeral joint. It also maps the usual pain generators: infraspinatus and teres minor tendinopathy, posterior deltoid strain, and the interval around the spinoglenoid notch where suprascapular nerve compression can selectively weaken external rotation without obvious trapezius involvement. Small distances matter. Use this artwork for gross anatomy and kinesiology teaching when introducing scapulohumeral rhythm, or for sports medicine and orthopedic content discussing posterior shoulder pain, throwing injuries, and rotator cuff tear patterns seen on MRI and ultrasound. It also fits surgical education on posterior portal placement for shoulder arthroscopy and orientation to the scapular spine, acromion, and posterior axillary fold as surface landmarks. Anatomical accuracy verified by SciePro's Medical Advisory Board.