Citation

Cotti J, Vercher JL, Guillaume A. Behav. Brain Res. 2011; 218(1): 248-252.

Affiliation

Laboratoire de Neurobiologie de la Cognition, UMR CNRS 6155, Université de Provence, F-13331 Marseille, France.

Copyright

(Copyright © 2011, Elsevier Publishing)

DOI

10.1016/j.bbr.2010.12.002

PMID

21147174

Abstract

Execution of a saccadic eye movement towards the goal of a hand pointing movement improves the accuracy of this hand movement. Still controversial is the role of extra-retinal signals, i.e. efference copy of the saccadic command and/or ocular proprioception, in the definition of the hand pointing target. We report here that hand pointing movements produced without visual feedback, with accompanying saccades and towards a target extinguished at saccade onset, were modified after gain change of reactive saccades through saccadic adaptation. As we have previously shown that the adaptation of reactive saccades does not influence the target representations that are common to the eye and the hand motor sub-systems (Cotti et al., J Neurophysiol 2007), the results of the present study demonstrate that extra-retinal signals participate in defining the target of hand pointing movements.

Language: en