Comparison of Surface Sensor and Bone-Fixed Measurement of Humeral Motion

A common method of tracking humeral motion involves securing a thermoplastic cuff to the humerus with an electromagnetic sensor attached. The data on the accuracy of this technique are limited. This study addressed two questions: (a) How similar are surface and bone-fixed measurements of 3-D humeral rotations? (b) How similar are surface and bone-fixed measurements of 3-D humeral translations? Electromagnetic motion sensors were secured to a bone-fixed external humeral fixator, a surface humeral cuff, and the skin over the sternum and scapular acromion process. The 3-D data were collected during successive slow velocity (10–20°/second) repetitions of humeral active-assisted scapular plane abduction, sagittal plane flexion, and internal/external rotation with the arm adducted. Root mean square errors of surface measures compared to bone-fixed angular and translational values were calculated, and paired t-tests were computed between the two methods. Root mean square errors for humeral rotations ranged from ...

[1]  J G Andrews.  On the specification of joint configurations and motions. , 1984, Journal of biomechanics.

[2]  G R Johnson,et al.  Measurement of three-dimensional shoulder movement by an electromagnetic sensor. , 1990, Clinical biomechanics.

[3]  B F Morrey,et al.  Three‐dimensional kinematics of glenohumeral elevation , 1991, Journal of orthopaedic research : official publication of the Orthopaedic Research Society.

[4]  Arne Lundberg.  On the use of bone and skin markers in kinematics research , 1996 .

[5]  D A Nawoczenski,et al.  Three-dimensional scapular orientation and muscle activity at selected positions of humeral elevation. , 1996, The Journal of orthopaedic and sports physical therapy.

[6]  A. J. van den Bogert,et al.  Tibiocalcaneal motion during running, measured with external and bone markers. , 1997, Clinical biomechanics.

[7]  A. J. van den Bogert,et al.  Effect of skin movement on the analysis of skeletal knee joint motion during running. , 1997, Journal of biomechanics.

[8]  G L Smidt,et al.  Dynamic scapulohumeral rhythm: the effects of external resistance during elevation of the arm in the scapular plane. , 1998, The Journal of orthopaedic and sports physical therapy.

[9]  C.G.M. Meskers,et al.  3D shoulder position measurements using a six-degree-of-freedom electromagnetic tracking device. , 1998, Clinical biomechanics.

[10]  T. Cook,et al.  Alterations in shoulder kinematics and associated muscle activity in people with symptoms of shoulder impingement. , 2000, Physical therapy.

[11]  H Rodgers,et al.  Active and passive scapulohumeral movement in healthy persons: a comparison. , 2000, Archives of physical medicine and rehabilitation.

[12]  A R Karduna,et al.  Dynamic measurements of three-dimensional scapular kinematics: a validation study. , 2001, Journal of biomechanical engineering.