Normalization of horizontal pseudoneglect following right, but not left, upper limb amputation

Academic Article


  • Objectives: Subjects who have suffered limb amputations are known to have physiological alterations of their body's representation, or schema. Such changes of brain function might alter the right-left spatial allocation of attention. The goal of this study was to learn if, compared to normal subjects, limb amputees had alterations of right-left spatial attention. Methods: The subjects were veterans with amputation of one upper or lower limb. All subjects performed horizontal line bisections in their left, middle and right body-centered space. Results: Following right upper limb amputation, there appears to be a reduction of the normal left-sided bias (pseudoneglect) primarily for lines presented in the right body hemispace. Conclusions: This amputation-induced alteration of attentional bias might be related to changes in the body schema, a compensatory strategy, or alterations of scanning patterns. Further studies are needed to reproduce these results and to learn the underlying brain mechanism.
  • Authors

    Published In

  • Neuropsychologia  Journal
  • Digital Object Identifier (doi)

    Pubmed Id

  • 11793740
  • Author List

  • Kline JE; Clark AM; Chan BL; McAuliffe CL; Heilman KM; Tsao JW
  • Start Page

  • 1204
  • End Page

  • 1207
  • Volume

  • 47
  • Issue

  • 4