Functional range of movement of the hand : declination angles to reachable space
Pham,HT, Pathirana,PN and Caelli,T 2014, Functional range of movement of the hand : declination angles to reachable space, in EMBS 2014 : Proceedings of the 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, IEEE, Piscataway, N.J., pp. 6230-6233, doi: 10.1109/EMBC.2014.6945052.
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Title
Functional range of movement of the hand : declination angles to reachable space
IEEE Engineering in Medicine and Biology Society Conference
Start page
6230
End page
6233
Total pages
4
Publisher
IEEE
Place of publication
Piscataway, N.J.
Summary
The measurement of the range of hand joint movement is an essential part of clinical practice and rehabilitation. Current methods use three finger joint declination angles of the metacarpophalangeal, proximal interphalangeal and distal interphalangeal joints. In this paper we propose an alternate form of measurement for the finger movement. Using the notion of reachable space instead of declination angles has significant advantages. Firstly, it provides a visual and quantifiable method that therapists, insurance companies and patients can easily use to understand the functional capabilities of the hand. Secondly, it eliminates the redundant declination angle constraints. Finally, reachable space, defined by a set of reachable fingertip positions, can be measured and constructed by using a modern camera such as Creative Senz3D or built-in hand gesture sensors such as the Leap Motion Controller. Use of cameras or optical-type sensors for this purpose have considerable benefits such as eliminating and minimal involvement of therapist errors, non-contact measurement in addition to valuable time saving for the clinician. A comparison between using declination angles and reachable space were made based on Hume's experiment on functional range of movement to prove the efficiency of this new approach.
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