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Pointing to a target from an upright position in human: tuning of postural responses when there is target uncertainty

Abstract : Human subjects performed, from a standing position, rapid hand pointings to visual targets located within or beyond the prehension space. To examine the interaction between posture and the goal-directed movement we introduced a visual double-step perturbation requiring a reprogramming of the hand movement. Trials directed towards the same spatial goal but differentiated only by the likeliness of a visual double-step were compared. The hand kinematics was not affected by the uncertainty of the visual perturbation; an increased trunk bending, however, was observed. This suggests that uncertainty constraints are integrated in a predictive manner for the optimal coordination of the hand and postural control systems. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved.
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Submitted on : Monday, January 16, 2017 - 6:02:12 PM
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O Martin, N Teasdale, M Simoneau, P Corbeil, C Bourdin. Pointing to a target from an upright position in human: tuning of postural responses when there is target uncertainty. Neuroscience Letters, Elsevier, 2000, 281 (1), pp.53-56. ⟨10.1016/S0304-3940(00)00801-6⟩. ⟨hal-01436928⟩

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