Reference frame conversions for repeated arm movements

Journal of Neurophysiology
Gianluca U Sorrento, Denise Y P Henriques

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 pointin...Continue Reading

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Citations

Apr 30, 2010·Experimental Brain Research·Katja FiehlerDenise Y P Henriques
Nov 16, 2010·Experimental Brain Research·Stephanie Westendorff, Alexander Gail
Oct 18, 2012·Experimental Brain Research·C C Gonzalez, M R Burke
Jan 19, 2011·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·W Pieter Medendorp
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Mar 20, 2012·Neuroscience Letters·Aidan A ThompsonDenise Y P Henriques
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Jan 18, 2011·Vision Research·Aidan A Thompson, Denise Y P Henriques
Sep 21, 2010·Vision Research·Aidan A Thompson, Denise Y P Henriques
Dec 2, 2011·Perception·Koichi Shimono, Atsuki Higashiyama
Sep 5, 2008·Journal of Neurophysiology·Aidan A Thompson, Denise Y P Henriques

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