Decay in visuomotor representations during manual aiming |
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Authors: | Binsted Gordon Rolheiser Tyler M Chua Romeo |
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Institution: | College of Kinesiology, University of Saskatchewan, Saskatoon, SK S7N 5B2, Canada. gord.binsted@usask.ca |
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Abstract: | The time course of the decay of spatial representations used for planning and controlling manual aiming has not been established. The authors' purpose in the present investigation was to generate a psychometric function for memory-guided reaching movements. Eight university-aged students performed a reciprocal tapping task for 10 s. Participants could see the targets for 5 s; then, vision of the targets was occluded. The present findings provide mixed support for 2 prominent theories concerning memory representations. Variability increased concurrently with the removal of vision of the targets, supporting the real-time hypothesis. However, a brief plateau in the curve was apparent for approximately 2 s after vision was removed, consistent with the use of a highly accurate representation for action. |
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