Lateral Perspective of the Teres Minor Under the Skin

Description

Seen from the lateral aspect, the scapula lies posterior to the rib cage with the clavicle projecting anteriorly toward the acromion, and the proximal humerus sits inferior and lateral to the glenoid cavity at the shoulder joint. The teres minor is highlighted along the posterior scapula, arising from the lateral border of the scapula and coursing laterally to the greater tubercle of the humerus, tucked deep to the posterior deltoid region. Nearby bony landmarks that orient the muscle include the acromion superiorly and the spine of the scapula posteriorly. Small muscle. Big landmark. Teres minor is the rotator cuff’s posterior-inferior cuff component, and this lateral perspective helps clarify its line of pull for external rotation and posterior stabilization of the glenohumeral joint when the arm is abducted. Clinically, it matters in axillary nerve and posterior circumflex humeral artery relationships around the quadrangular space (bounded by teres minor superiorly and teres major inferiorly), and in interpreting fatty infiltration or atrophy patterns on shoulder MRI, where isolated teres minor involvement can point toward quadrangular space syndrome. The view also supports teaching the difference between teres minor and infraspinatus insertions on the greater tubercle, a common point of confusion during rotator cuff repair planning. Use this illustration in shoulder and upper limb anatomy modules, sports medicine and orthopaedic lectures on rotator cuff pathology, and medical publishing that needs a clean lateral map of scapulohumeral relationships for labeling. It also fits patient education sheets for external rotation weakness and posterior shoulder pain when paired with clinical notes on axillary nerve entrapment. Anatomical accuracy verified by SciePro's Medical Advisory Board.