Abstract
Adhesive capsulitis (AC) is a glenohumeral (GH) joint condition, characterized by decreased GH joint range of motion (ROM) and compensatory ROM in the elbow and scapulothoracic (ST) joint. To evaluate AC progression in clinical settings, objective movement analysis by available systems would be valuable. This study aimed to assess within-session and intra- and inter-operator reliability/agreement of such a motion capture system. The MVN-Awinda® system from Xsens Technologies (Enschede, The Netherlands) was used to assess ST, GH, and elbow ROM during four tasks (GH external rotation, combing hair, grasping a seatbelt, placing a cup on a shelf) in 10 AC patients (mean age = 54 (±6), 7 females), on two test occasions (accompanied by different operators on second occasion). Standard error of measurements (SEMs) were below 1.5° for ST pro-retraction and 4.6° for GH in-external rotation during GH external rotation; below 6.6° for ST tilt, 6.4° for GH flexion-extension, 7.1° for elbow flexion-extension during combing hair; below 4.4° for GH ab-adduction, 13° for GH in-external rotation, 6.8° for elbow flexion-extension during grasping the seatbelt; below 11° for all ST and GH joint rotations during placing a cup on a shelf. Therefore, to evaluate AC progression, inertial sensors systems can be applied during the execution of functional tasks.
Highlights
Adhesive capsulitis (AC), or frozen shoulder, is a pathological glenohumeral (GH) joint condition, characterized by adhesions across the GH joint capsule and surrounding ligaments, which negatively affect active and passive GH mobility [1,2]
To evaluate AC progression, inertial sensors systems can be applied during the execution of functional tasks
This diagnosis was based on the criteria described by The American Physical Therapy Association [3]: (a) 50% loss of passive GH external rotation motion, as compared to the unaffected side; (b) GH motion losses greater than 25% in at least two other GH movements than external rotation, as compared to the unaffected side; (c) pain accompanying motion losses, which is present for at least one month at the time of diagnosis; and (d) the pain and mobility deficits which are described for at least one month at time of diagnosis, have to be stable or worsen during that month
Summary
Adhesive capsulitis (AC), or frozen shoulder, is a pathological glenohumeral (GH) joint condition, characterized by adhesions across the GH joint capsule and surrounding ligaments, which negatively affect active and passive GH mobility [1,2]. Movement restrictions generally occur in all movement planes, with more pain towards the end of the available joint motion and with more external rotation restrictions in elevated arm positions [3]. AC highly interferes with the independent performance of activities of daily living [3]. The incidence of AC is 3% to 5% in the general. Apart from pain and GH mobility deficits [5,6], AC leads to shoulder dysfunctions and reduces daily life autonomy and quality of life [2]
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