Article Document Academic Article Information Content Entity Continuant Continuant Journal Article Entity Entity Generically Dependent Continuant 2025-05-08T04:36:36 RDF description of The accuracy of measuring glenohumeral motion with a surface humeral cuff - http://repository.healthpartners.com/individual/document-rn19627 Measurement 45 The accuracy of measuring glenohumeral motion with a surface humeral cuff Journal of Biomechanics Orthopedics Simulation 14947 10.1016/j.jbiomech.2012.02.003 2022-02-21T22:48:57.408-06:00 <p>Conclusions about normal and pathologic shoulder motion are frequently made from studies using skin surface markers, yet accuracy of such sensors representing humeral motion is not well known. Nineteen subjects were investigated with flock of birds electromagnetic sensors attached to transcortical pins placed into the scapula and humerus, and a thermoplastic cuff secured on the arm. Subjects completed two repetitions of raising and lowering the arm in the sagittal, scapular and coronal planes, as well as shoulder internal and external rotation with the elbow at the side and abducted to 90 degrees . Humeral motion was recorded simultaneously from surface and bone fixed sensors. The average magnitude of error was calculated for the surface and bone fixed measurements throughout the range of motion. ANOVA tested for differences across angles of elevation, raising and lowering, and differences in body mass index. For all five motions tested, the plane of elevation rotation average absolute error ranged from 0-2 degrees , while the humeral elevation rotation average error ranged from 0-4 degrees . The axial rotation average absolute error was much greater, ranging from 5 degrees during elevation motions to approaching 30 degrees at maximum excursion of internal/external rotation motions. Average absolute error was greater in subjects with body mass index greater than 25. Surface sensors are an accurate way of measuring humeral elevation rotations and plane of elevation rotations. Conversely, there is a large amount of average error for axial rotations when using a humeral cuff to measure glenohumeral internal/external rotation as the primary motion.<p> document-rn19627 7 Models public 24474 Shoulder