Abstract
Effects of reduced support, tactile and proprioceptive afferentation on mapping and manual operating the joystick were evaluated with participation of 14 female subjects. The idea was to compare performance of a 15 minute motor-ocular task in the conditions of dry immersion and lying supine on a couch. The subjects were to direct the pointer from the screen center to one of 8 randomly emerging targets. Pointer coordinates and emergence scenarios were registered; time to reach the target and geometry of pointer trajectories were calculated. Comparison was made by 4 characteristics: latent time of reaction, time of implementing the reaction, relative trajectory length, and averaged precision of trajectory to a target and the sum of trajectories. It was found that despite some individual differences, for all participants these 4 characteristics, equally of moving to a specific target or the sum of targets, were essentially similar. The results attest to the applicability of testing supine subject's manual tracking of the pointer to a target as a baseline data collection in dry immersion experiments aimed to define whether support-deprivation impacts effectiveness of manual moving the pointer to target.
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