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Article Dans Une Revue Journal of Motor Behavior Année : 1989

Discrete visual samples may control locomotor equilibrium and foot positioning in man.

A Assaiante
  • Fonction : Auteur
A. Marchand
  • Fonction : Auteur

Résumé

The static or dynamic visual cues required for equilibrium as well as for foot guidance in visually guided locomotion in man were studied using a variety of locomotion supports and illumination and visual conditions. Stroboscopic illumination (brief flashes) and intermittent lighting (longer flashes) were used to control and to vary the visual sampling frequency of static (positional/orientational) visual cues. There were three main findings: First, visual control of foot positioning during locomotion over a narrow support depends mainly upon the availability of high frequency static visual cues (up to about 12 Hz); and third, static visual cues required for equilibrium control are extracted from both the peripheral and the central visual field. Assuming that discrete demands for feedback occur, a simple probabilistic model was proposed, according to which the mean time that elapses following presentation of static visual cues about positions or changes of position accounts for the differences in the difficulty of the various illumination conditions.

Domaines

Neurosciences
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Dates et versions

hal-01989749 , version 1 (22-01-2019)

Identifiants

  • HAL Id : hal-01989749 , version 1
  • PUBMED : 15117674

Citer

Christine Assaiante, A Assaiante, A. Marchand, B. Amblard. Discrete visual samples may control locomotor equilibrium and foot positioning in man.. Journal of Motor Behavior, 1989, 21 (1), pp.72-91. ⟨hal-01989749⟩

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