Frozen shoulder or shoulder stiffness from Parkinson disease?

ConclusionThe postural alteration observed in PD is the primum movens for shoulder pathology, since anterior tilt of the scapula, which occurs with the increment of thoracic kyphosis, yields to a subacromial impingement. A closed loop is then created, as the rigidity of the shoulder causes further alteration in the posture, which worsens the impingement syndrome and so on.

Source: Musculoskeletal Surgery - October 1, 2018 Category: Orthopaedics Source Type: research