Laboratoire de Neurobiologie de Cognition, UMR CNRS 6155, Université de Provence, F-13331 Marseille, France.
Behav Brain Res. 2011 Mar 17;218(1):248-52. doi: 10.1016/j.bbr.2010.12.002. Epub 2010 Dec 13.
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 J, Guillaume A, Alahyane N, Pelisson D, Vercher JL. Adaptation of voluntary saccades, but not of reactive saccades. Transfers to hand pointing movements. J Neurophysiol 2007;98:602-12), the results of the present study demonstrate that extra-retinal signals participate in defining the target of hand pointing movements.
执行扫视眼动以指向手的指向运动的目标可以提高手运动的准确性。眼球运动的传出副本和/或眼本体感觉等视网膜外信号在定义手指向目标中的作用仍存在争议。我们在此报告，在没有视觉反馈的情况下进行的手指向运动，伴随着扫视运动，并且在扫视开始时目标被熄灭，在手的反应性扫视的增益变化后，通过扫视适应进行了修改。正如我们之前所表明的，反应性扫视的适应不会影响眼睛和手部运动子系统共有的目标表示（Cotti J，Guillaume A，Alahyane N，Pelisson D，Vercher JL。自愿扫视的适应，而不是反应性扫视的适应。对手指运动的转移。J Neurophysiol 2007; 98:602-12），本研究的结果表明，视网膜外信号参与定义手指向运动的目标。
