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.
de Rugy
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Department of Kinesiology, The Pennsylvania State University, 266 Recreation Building, University Park, State College, PA 16802, USA. aug3@psu.edu
Taga
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Montagne
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Buekers
M J
MJ
Laurent
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M
D005528:Foot / Q000502:physiology*; D006801:Humans; D008960:Models, Psychological; D011597:Psychomotor Performance / Q000502:physiology*; D016138:Walking / Q000502:physiology*