Distractors
The glenohumeral joint takes over the entire 180 degrees of humeral elevation without scapular contribution
The rhomboids shorten chronically, pulling the medial border of the scapula closer to the spine
The pectoralis minor relaxes, causing an exaggerated posterior tilt of the scapula
Key
The nervous system over-recruits the upper trapezius and levator scapulae, causing a shoulder hitching problem
Question
As described in “Scapular Mechanics and Upper Back Pain” by Whitney Lowe, what is a primary mechanical consequence when the serratus anterior and lower trapezius become inhibited or underactive in scapular dyskinesis?