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A System for Measuring Finger Forces During Grasping


T. Keller, M.R. Popovic, M. Amman, C. Andereggen, C. Dumont

journal: Proceedings of International Functional Electrical Stimulation Society (IFESS 2000) Meeting, Aalborg, Denmark, pp. 386-389

A device that provides quantitative assessment of the grasping function and allows the grasping function improvements to be monitored over time can potentially be very useful for hand surgeons, physio-therapists and occupational therapists. A Dynamic Grasping Assessment System (DGAS) that is capable of measuring finger forces during wrist extension, flexion, adduction and abduction was developed. The DGAS can measure forces for each individual finger in the range from 0 to 125 N with accuracy of +/- 0.5 N, and can measure the wrist extension/flexion angle and the wrist ulnar/radial abduction angle with an accuracy of +/- 0.25 deg. Furthermore the DGAS is capable of generating resistive torque during the wrist motion and allows to assess finger forces during wrist motion against resis-tive load. The DGAS can provide the following data: (1) finger forces as a function of time, wrist angle, wrist angular velocity and resistive load, (2) statistical analy-sis of the recorded finger force data, (3) drifts of the finger forces as a result of fatigue, and (4) the range of wrist motion for a given resistive load. Further analysis of the measured data, e.g. correlation analysis between the finger forces and the wrist angles, can be done off-line.

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% Autogenerated BibTeX entry
@Article { KelEtal:2000:IFA_131,
    author={T. Keller and M.R. Popovic and M. Amman and C. Andereggen and C. Dumont},
    title={{A System for Measuring Finger Forces During Grasping}},
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