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Scapular depression refers to the caudal motion of the scapula (scapulothoracic joint). In most instances, depression of the scapula is a passive process (due to gravity) that is facilitated by movement at the acromioclavicular joint. Occasionally some muscular attachments serve as active depressors, the most commonly described being the inferior fibers of serratus anterior and pectoralis minor 1-3.
Other minor depressors of the scapula include:
- latissimus dorsi
- pectoralis major (secondarily through its action on the clavicle and humerus)
- trapezius 2,3
It is important to note that no one movement of the scapula occurs in isolation and no individual muscle exerts a singular action on the scapula. The opposite movement is scapular elevation.