Abstract
This paper investigates prehensile movement (PM) characteristics of non-dominant hand (NDH) with visual illusion (VI) in immersive virtual reality (VR) with haptic feedback. A VR program with compensation for subtle finger motions (FM) of a hemiplegic hand was developed. There are two controlling factors of VI: visibility of virtual hand and virtual object- visual factor (VF), and metacarpophalangeal joint angle (MCP) gain- gain factor (GF). This research consists of two experiments: proprioception experiment with everyday life objects and VF, and PM characteristics experiment with VI. As a statistical result, 2-way analysis of variance (ANOVA) test revealed that object size affects significantly towards steady-state pinch grip aperture (SGA). As for the second experiment, peak grip aperture (PGA), SGA error (SGAE) and steady-state pinch grip aperture time (SGAT) were influenced by VI. From this study, we concluded that VI impacts PM for healthy subjects, and further research is possible toward hemiplegic stroke patients (HSP).
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