title: Conservative treatment preferences and the plausible mechanism of Neer's stage 1 of shoulder impingement in younger people.
abstract: The interaction of various factors in the vicious cycle (VC) of subacromial impingement syndrome (SIS) is complex and there are conservative treatment preferences for speedy rehabilitation. The mechanism of SIS is not fully understood and the inappropriate treatment priorities cause delay in rehabilitation. SIS is related to the reduction in the subacromial space (SS). Posterior capsular tightness (PCT) and rotator cuff (RC) dysfunction are the two basic mechanisms in this regard. PCT may cause anterosuperior translation of humeral head (HH) and anterior acromion tipping through scapular dyskinesis, thereby reducing the subacromial space. Alteration in the force couple of muscle secondary to scapular dyskinesis eventually causes injury to subacromial structures. The rotator cuff is important in centring the humeral head in the glenoid cavity and superior translation of humeral head occurs if their function is compromised. Posterior capsular tightness may affect the function of rotator cuff action which leads to early fatigue, dysfunction of these muscles and eventually impingement. Adhesive changes take place in various structures around the shoulder secondary to impingement pain and relative immobility, which further aggravates the problem. To reverse the vicious cycle, conservative intervention should therefore be directed to loosen posterior capsular tightness, restore rotator cuff function through appropriate exercise in a pain-free range through appropriate exercise, mobilisation of adhesion through teraservers friction or pain-free mobilisation or grade I and grade II manipulation. Depending on the level of irritability, pain control intervention could be considered alongside.
mesh_terms: D006801:Humans; D057240:Patient Preference; D016059:Range of Motion, Articular; D017006:Rotator Cuff / Q000503:physiopathology*; D019534:Shoulder Impingement Syndrome / Q000503:physiopathology* / Q000628:therapy; D012785:Shoulder Joint / Q000503:physiopathology*
keywords: Vicious cycle, Subacromial impingement syndrome, Posterior capsular tightness.