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Differential influences of prism adaptation on reflexive and voluntary covert attention

Published online by Cambridge University Press:  17 May 2006

CHRISTOPHER STRIEMER ,
JEFFERY SABLATNIG  and
JAMES DANCKERT
CHRISTOPHER STRIEMER
Affiliation:
Department of Psychology, University of Waterloo, Waterloo, Ontario, Canada
JEFFERY SABLATNIG
Affiliation:
Department of Psychology, University of Waterloo, Waterloo, Ontario, Canada
JAMES DANCKERT
Affiliation:
Department of Psychology, University of Waterloo, Waterloo, Ontario, Canada
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Abstract

Recent research has demonstrated some beneficial effects in patients with neglect using rightward shifting prismatic lenses. Despite a great deal of research exploring this effect, we know very little about the cognitive mechanisms underlying prism adaptation in neglect. We examined the possibility that prism adaptation influences visual attention by having healthy participants complete either a reflexive or a voluntary covert visual attention cuing paradigm before and after adaptation to leftward, rightward, or sham (no shift) prisms. The results for reflexive orienting demonstrated that a subset of participants with large cuing effects before prism adaptation were faster to reorient attention away from an invalid cue on the side of space opposite the prismatic shift post adaptation. For voluntary orienting, left prisms increased the efficiency of voluntary attention in both left and right visual space in participants with a small cuing effect before prism adaptation. In contrast, right prisms decreased the efficiency of voluntary attention in both left and right space for participants with a large cuing effect before prism adaptation. No significant effects were observed in the sham prism groups. These results suggest that prism adaptation may exert a variety of influences on attentional orienting mechanisms. (JINS, 2006, 12, 337–349.)

Keywords

NeglectParietal lobesVisuomotor adaptationSpatial representationPerceptual disordersSensory motor performance
Type
Research Article
Information
Journal of the International Neuropsychological Society , Volume 12 , Issue 3 , May 2006 , pp. 337 - 349
Copyright
© 2006 The International Neuropsychological Society

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