One of the major causes of SAIS is Upper crossed syndrome : A Part from The Book Chapter : A Guide for Quick Assessment and Management of Subacromial Impingement Syndrome

Muscular Imbalances

One of the major causes of SAIS is Upper crossed syndrome (UCS). In UCS, tightness of levator scapulae and upper trapezius is crossed with tightness of pectoralis major and minor, whereas weakness of weakness of scapular stabilizers is crossed with the weakness of deep cervical flexors. These muscular abnormalities leads to a forward head and rounded shoulder posture. This kind of posture and muscular abnormalities leads to internal rotation of the humerus during overhead activities, inadequate posterior tilting and upward rotation of the scapula, increase in anterior and superior translation of humerus causing narrowing of the subacromial space and impingement of rotator cuff. The causes of muscular imbalances seen in SAIS is mentioned in detail in flowchart format in.

Author(s) Details:

Tushara Nair,
College of Physiotherapy, Sumandeep Vidyapeeth (Deemed to be University), Vadodara, Gujarat, India.

G. P. Kumar,
College of Physiotherapy, Sumandeep Vidyapeeth (Deemed to be University), Vadodara, Gujarat, India.

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