Perception--action coupling model for human locomotor pointing.
How do humans achieve the precise positioning of the feet during walking, for example, to reach the first step of a stairway? We addressed this question at the visuomotor integration level. Based on the optical specification of the required adaptation, a dynamical system model of the visuomotor control of human locomotor pointing was devised for the positioning of a foot on a visible target on the floor during walking. Visuomotor integration consists of directly linking optical information to a motor command that specifically modulates step length in accordance with the ongoing dynamics of locomotor pattern generation. The adaptation of locomotion emerges from a perception-action coupling type of control based on temporal information rather than on feedforward planning of movements. The proposed model reproduces experimental results obtained for human locomotor pointing.
Department of Kinesiology, The Pennsylvania State University, 266 Recreation Building, University Park, State College, PA 16802, USA. aug3@psu.edu
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de Rugy
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Taga
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Montagne
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Buekers
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Laurent
D005528:Foot / Q000502:physiology*; D006801:Humans; D008960:Models, Psychological; D011597:Psychomotor Performance / Q000502:physiology*; D016138:Walking / Q000502:physiology*