title: Quantification of two-dimensional glenohumeral rhythm in persons with and without symptoms of shoulder impingement.
abstract: A repeated-measures design was used to assess glenohumeral rhythm in 10 patients with shoulder impingement and 10 pain-free persons and to assess the effects of subacromial injection on glenohumeral rhythm within the impingement group. Scapular-plane anterior-to-posterior x-rays of the scapula and humerus were obtained at 5 angles of arm elevation (resting, 30 degrees, 60 degrees, 90 degrees, 120 degrees). For the impingement group, x-rays were repeated after subacromial injection (10 mL of 1% lidocaine). No significant differences in glenohumeral rhythm were found between the impingement and control groups across all arm-elevation angles.
authors.affiliation: Department of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA 90033, USA.
authors.forename: Wendy S
authors.initials: WS
authors.lastname: Burke
authors.forename: C Thomas
authors.initials: CT
authors.lastname: Vangsness
authors.forename: Christopher M
authors.initials: CM
authors.lastname: Powers
mesh_terms: D000328:Adult; D000779:Anesthetics, Local / Q000627:therapeutic use; D005260:Female; D006801:Humans; D006811:Humerus / Q000000981:diagnostic imaging / Q000503:physiopathology*; D007270:Injections, Intra-Articular; D008012:Lidocaine / Q000627:therapeutic use; D008297:Male; D015588:Observer Variation; D011859:Radiography; D016059:Range of Motion, Articular; D015203:Reproducibility of Results; D012540:Scapula / Q000000981:diagnostic imaging / Q000503:physiopathology*; D019534:Shoulder Impingement Syndrome / Q000000981:diagnostic imaging / Q000188:drug therapy / Q000503:physiopathology*; D012785:Shoulder Joint / Q000000981:diagnostic imaging / Q000503:physiopathology*; D020069:Shoulder Pain / Q000188:drug therapy / Q000503:physiopathology*
chemical_list: D000779:Anesthetics, Local; D008012:Lidocaine