Spatial invariance in anticipatory orienting behaviour during human navigation

We have recently reported that the head systematically deviates toward the future direction of the trajectory about 500 ms before attaining a turning point of 90° corner trajectories both in light and in darkness. Here, we investigated how this anticipatory strategy is modified whilst varying visual...

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Bibliographic Details
Published inNeuroscience letters Vol. 339; no. 3; pp. 243 - 247
Main Authors Prévost, Pascal, Yuri, Ivanenko, Renato, Grasso, Alain, Berthoz
Format Journal Article
LanguageEnglish
Published Ireland Elsevier Ireland Ltd 27.03.2003
Subjects
Adult
Analysis of Variance
Anticipation
Feed-forward control
Female
Head movements
Head Movements - physiology
Humans
Locomotion
Locomotion - physiology
Male
Orientation - physiology
Reference frame
Spatial Behavior - physiology
Steering
Vision, Ocular - physiology
Locomotion
Anticipation
Steering
Reference frame
Feed-forward control
Head movements
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Summary:We have recently reported that the head systematically deviates toward the future direction of the trajectory about 500 ms before attaining a turning point of 90° corner trajectories both in light and in darkness. Here, we investigated how this anticipatory strategy is modified whilst varying visual conditions (Experiment 1) and walking speed (Experiment 2). Exp. 1 showed similar anticipatory behaviour when walking with or without vision. Exp. 2 (that varied walking speed; eyes open) showed that the head started to deviate at a constant distance rather than at a constant time to the corner. The results appear inconsistent with optic flow theories of the guidance of walking direction and might highlight the role of landmarks and/or egocentric direction in anticipatory orienting behaviour.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0304-3940
1872-7972
DOI:10.1016/S0304-3940(02)01390-3