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Forward movement away the midline of the body; moving the scapula away from the spine during prostration of the shoulder girdle. Typically accompanies Shoulder Internal Rotation, Transverse Adduction, and Tranverse Flexion. 1  Serratus anterior. 2  Pectoralis minor. 3  Levator scapulae.
This pattern is winging of the entire medial border of the scapula at rest. It becomes more prominent in the cocking position and after repetitive elevation of the upper extremity. It is caused by fatigue of the scapula stabilising muscles (trapezius and rhomboids).