Serratus Anterior, Posterior View

Description

Posteriorly, the thoracic vertebral column runs in the midline with the ribs curving laterally, while each scapula rests on the posterolateral thoracic wall from roughly ribs 2 to 7. Along the lateral rib cage, the serratus anterior arises as digitations from the upper ribs and courses posteriorly toward the anterior surface of the medial border of the scapula, positioning it deep to the scapular body when viewed from behind. A thin layer of trapezius and rhomboid major and minor would normally overlie this relationship, so the illustration logically emphasizes the scapulothoracic interface rather than superficial contour. Clean bony landmarks. Clinically, serratus anterior matters because long thoracic nerve palsy produces medial winging of the scapula and loss of smooth upward rotation during overhead activity, a pattern that differs from spinal accessory nerve injury affecting the trapezius. This posterior view clarifies why the muscle is called the boxer’s muscle: its line of pull anchors the medial border to the rib cage during protraction and maintains scapular stability as the glenoid turns superiorly. It also helps separate serratus anterior from serratus posterior muscles, which attach to ribs but relate to the thoracic wall and respiration rather than scapular control. Use this artwork in gross anatomy and kinesiology teaching to explain scapulothoracic motion, protraction, and upward rotation, and in sports medicine or neurology materials discussing winged scapula, long thoracic nerve vulnerability, and examination findings along the medial scapular border. It also fits operative and rehabilitation contexts where clinicians need to communicate serratus anterior activation, scapular dyskinesis, and rib-based attachment sites using posterior landmarks. Anatomical accuracy verified by SciePro's Medical Advisory Board.