Prism adaptation power on spatial cognition: Adaptation to different optical deviations in healthy individuals

Abstract : The main objective of the present study was to determine the minimal optical deviation responsible for cognitive after-effects in healthy individuals and to explore whether there was a relationship between the degree of optical deviation and cognitive after-effects. Therefore different leftward optical deviations (8 degrees, 10 degrees and 15 degrees) were used in three different groups of healthy participants. Sensorimotor after-effects (evaluating the visuo-manual realignment) were assessed using an open-loop pointing task and cognitive after-effects (evaluating changes in spatial representation) were assessed using manual and perceptual (landmark) line bisection tasks. Results revealed that exposure to 8 degrees, 10 degrees and 15 degrees optical shifts produced sensorimotor after-effects. In contrast, the occurrence of cognitive after-effects depended on the optical deviation. Adaptation to an 8 degrees leftward optical deviation did not produce cognitive after-effects. Adaptation to a 10 degrees leftward optical deviation was responsible for after-effects in the manual line bisection task only. Adaptation to a 15 degrees leftward optical deviation produced after-effects in both the manual and perceptual line bisection tasks. All cognitive after-effects were rightward and were similar to mild, neglect-like manifestations. Both sensorimotor and cognitive after-effects were correlated with the degree of optical deviation. Our results are of methodological and theoretical interest to those interested in sensorimotor plasticity and spatial cognition.
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https://hal-univ-bourgogne.archives-ouvertes.fr/hal-01302866
Contributeur : Caps - Université de Bourgogne <>
Soumis le : vendredi 15 avril 2016 - 12:13:20
Dernière modification le : vendredi 8 juin 2018 - 14:50:17

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Carine Michel, Rémy Cruz. Prism adaptation power on spatial cognition: Adaptation to different optical deviations in healthy individuals. Neuroscience Letters, Elsevier, 2015, 590, pp.145-149. ⟨http://www.sciencedirect.com/science/article/pii/S0304394015000968⟩. ⟨10.1016/j.neulet.2015.02.001⟩. ⟨hal-01302866⟩

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