Experimental Brain Research

, Volume 185, Issue 2, pp 259–268

Asymmetrical after-effects of prism adaptation during goal oriented locomotion

  • Carine Michel
  • Paul Vernet
  • Grégoire Courtine
  • Yves Ballay
  • Thierry Pozzo
Research Article

DOI: 10.1007/s00221-007-1152-4

Cite this article as:
Michel, C., Vernet, P., Courtine, G. et al. Exp Brain Res (2008) 185: 259. doi:10.1007/s00221-007-1152-4

Abstract

In healthy subjects, sensorimotor after-effects of prism adaptation are known to be symmetric (they appear after using leftward and rightward optical deviations), whereas cognitive after-effects are asymmetric (they appear after using a leftward optical deviation) and rightward oriented. Sensorimotor and cognitive after-effects have been classically studied using different specific tasks. The purpose of the current study was to investigate whether both after-effects may be involved in a same visuo-spatial task. Therefore we compared the amplitude of after-effects following adaptation to a rightward or leftward optical deviation. After-effects were assessed by manual pointing or goal oriented locomotor task. The main result showed a greater amplitude for rightward locomotor after-effects (after adaptation to a leftward deviation) than for leftward locomotor after-effects (after adaptation to a rightward deviation). This means that cognitive after-effects may add to sensorimotor after-effects following adaptation to a leftward optical deviation. This asymmetry challenges the classical distinction between sensorimotor and cognitive after-effects of prism adaptation. Implications for the functional mechanisms and the neuroanatomical substrate of prism adaptation are discussed.

Keywords

Prism adaptation Locomotion Space representation Cognitive Sensorimotor Simulation of neglect 

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Carine Michel
    • 1
    • 2
  • Paul Vernet
    • 1
    • 2
  • Grégoire Courtine
    • 1
    • 2
  • Yves Ballay
    • 1
    • 2
  • Thierry Pozzo
    • 1
    • 2
  1. 1.UFR STAPSUniversité de Bourgogne, DijonDijonFrance
  2. 2.INSERMDijonFrance