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Misdirections in Slow, Goal-directed Arm Movements Are Not Primarily Visually Based by J. B. de Graaf; A. C. Sittig; J. J. Denier van der Gon is a Neuroscience article available to read on EtoBox.

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In a previous study we found that the initial direction of slow, goal-directed arm movements deviates consistently from the direction of the actual straight line between the starting position and the target position. We now investigate whether these deviations are caused by imperfections or peculiarities in the processing of vision-related spatial information, such as retinal information, and eye- and head-position information. This could lead to incorrect localization of the target relative to the starting position. Subjects were seated in front of a horizontal surface and had to move their arm slowly and accurately in the direction of target positions. We varied the amount of vision-related spatial information. In experiment 1, subjects were presented with visual targets and could see their moving arm. In experiment 2, the subjects were again presented with visual targets, but now they could not see their moving arm. In experiment 3, the subjects were blindfolded and had to move their arm towards tactile targets. In all three experiments we found comparable consistent deviations in the initial movement direction. We also instructed congenitally and early-blind subjects to move th

Who reads Misdirections in Slow, Goal-directed Arm Movements Are Not Primarily Visually Based?

Author

J. B. de Graaf; A. C. Sittig; J. J. Denier van der Gon

Publisher

Springer-Verlag; Springer Verlag; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 0014-4819)

Published

1994

Language

EN

Field

Neuroscience (Life Sciences)