Target and hand position information in the online control of goal-directed arm movements

摘要: The present study compared the contribution of visual information hand and target position to online control goal-directed arm movements. Their respective contributions were assessed by examining how human subjects reacted a change either their seen or near onset reaching movement. Subjects, seated head-fixed in dark room, instructed look at reach with pointer towards targets located fronto-parallel plane different distances right starting position. LEDs mounted on tip used provide true erroneous feedback about In some trials, LED that signalled actual was shifted 4.5 cm left during ocular saccade target. Because saccadic suppression, did not perceive these displacements, which occurred movement onset. results showed modifications amplitude appeared, average, 150 ms earlier reached greater extent (mean difference=2.7 cm) when there than occurred. These findings highlight weight Visual relative may be less contributive because proprioception also provides limb