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- W2083080348 abstract "The aim of this study was to further understand how the brain represents spatial information for shaping aiming movements to targets. Both behavioral and neurophysiological studies have shown that the brain represents spatial memory for reaching targets in an eye-fixed frame. To date, these studies have only shown how the brain stores and updates target locations for generating a single arm movement. But once a target's location has been computed relative to the hand to program a pointing movement, is that information reused for subsequent movements to the same location? Or is the remembered target location reconverted from eye to motor coordinates each time a pointing movement is made? To test between these two possibilities, we had subjects point twice to the remembered location of a previously foveated target after shifting their gaze to the opposite side of the target site before each pointing movement. When we compared the direction of pointing errors for the second movement to those of the first, we found that errors for each movement varied as a function of current gaze so that pointing endpoints fell on opposite sides of the remembered target site in the same trial. Our results suggest that when shaping multiple pointing movements to the same location the brain does not use information from the previous arm movement such as an arm-fixed representation of the target but instead mainly uses the updated eye-fixed representation of the target to recalculate its location into the appropriate motor frame." @default.
- W2083080348 created "2016-06-24" @default.
- W2083080348 creator A5010023906 @default.
- W2083080348 creator A5080774757 @default.
- W2083080348 date "2008-06-01" @default.
- W2083080348 modified "2023-09-27" @default.
- W2083080348 title "Reference Frame Conversions for Repeated Arm Movements" @default.
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- W2083080348 doi "https://doi.org/10.1152/jn.90225.2008" @default.
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