A kinematic analysis of a haptic handheld stylus in a virtual environment: a study in healthy subjects.

J Neuroeng Rehabil

Rehabilitation medicine, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at Göteborg University, Guldhedsgatan 19, Göteborg, Sweden.

Published: May 2007

Background: Virtual Reality provides new options for conducting motor assessment and training within computer-generated 3 dimensional environments. To date very little has been reported about normal performance in virtual environments. The objective of this study was to evaluate the test-retest reliability of a clinical procedure measuring trajectories with a haptic handheld stylus in a virtual environment and to establish normative data in healthy subjects using this haptic device.

Methods: Fifty-eight normal subjects; aged from 20 to 69, performed 3 dimensional hand movements in a virtual environment using a haptic device on three occasions within one week. Test-retest stability and standardized normative data were obtained for all subjects.

Results: No difference was found between test and retest. The limits of agreement revealed that changes in an individual's performance could not be detected. There was a training effect between the first test occasion and the third test occasion. Normative data are presented.

Conclusion: A new test was developed for recording the kinematics of the handheld haptic stylus in a virtual environment. The normative data will be used for purposes of comparison in future assessments, such as before and after training of persons with neurological deficits.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1877808PMC
http://dx.doi.org/10.1186/1743-0003-4-13DOI Listing

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