Is proprioception calibrated during visually guided movements?
In the present study, a visuomotor adaptation paradigm was used to determine whether proprioception is calibrated during visually guided movements. A full vision group (FV) was given vision of a cursor representing hand position and was asked to aim towards visible targets. A no vision group (NV) performed the same task without vision of the cursor and was given knowledge of results (KR) after movement completion. A directional bias was introduced between the location of the cursor and the location of the hand in an adaptation phase, which resulted in a deviation to the right of the intended target. Of interest was whether participants would still show rightward deviations in a post-test series of trials in which vision was removed (aftereffects). The NV group presented strong aftereffects. However, the FV group only showed modest aftereffects early in the post-test, which rapidly decayed over the course of the post-test. Further analyses showed that the presence of those early aftereffects was due to an offline influence of vision on movement planning.
Bernier
Pierre-Michel
PM
School of Human Kinetics, The University of British Columbia, 210-6081 University Boulevard, Vancouver, BC, Canada V6T 1Z1.
Chua
Romeo
R
Franks
Ian M
IM
D000328:Adult; D000704:Analysis of Variance; D001696:Biomechanical Phenomena; D005246:Feedback; D006801:Humans; D009068:Movement / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D011434:Proprioception / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology*; D014785:Vision, Ocular / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*