The formation of trajectories during goal‐oriented locomotion in humans. I. A stereotyped behaviour
- 17 October 2007
- journal article
- Published by Wiley in European Journal of Neuroscience
- Vol. 26 (8), 2376-2390
- https://doi.org/10.1111/j.1460-9568.2007.05836.x
Abstract
Human locomotion was investigated in a goal-oriented task where subjects had to walk to and through a doorway starting from a fixed position and orientation in space. The door was located at different positions and orientations in space, resulting in a total of 40 targets. While no specific constraint was provided to subjects in terms of the path they were to follow or the expected walking speeds, all of them generated very similar trajectories in terms of both path geometry and velocity profiles. These results are reminiscent of the stereotyped properties of the hand trajectories observed in arm reaching movements in studies over the last 20 years. This observation supports the hypothesis that common constraining mechanisms govern the generation of segmental and whole-body trajectories. In contrast, we observed that the subjects placed their feet at different spatial positions across repetitions, making unlikely the hypothesis that goal-oriented locomotion is planned as a succession of steps. Rather, our results suggest that common planning and/or control strategies underlie the formation of the whole locomotor trajectory during a spatially oriented task.Keywords
This publication has 25 references indexed in Scilit:
- The formation of trajectories during goal‐oriented locomotion in humans. II. A maximum smoothness modelEuropean Journal of Neuroscience, 2007
- Intersegmental Coordination During Human Locomotion: Does Planar Covariation of Elevation Angles Reflect Central Constraints?Journal of Neurophysiology, 2006
- Judgments of path, not heading, guide locomotion.Journal of Experimental Psychology: Human Perception and Performance, 2006
- Optimality principles in sensorimotor controlNature Neuroscience, 2004
- Computational approaches to motor controlTrends in Cognitive Sciences, 1997
- The predictive brainNeuroReport, 1996
- Moving in Three-Dimensional Space: Frames of Reference, Vectors, and Coordinate SystemsAnnual Review of Neuroscience, 1992
- Visuomotor Coordination in Reaching and LocomotionScience, 1989
- Neural dynamics of planned arm movements: Emergent invariants and speed-accuracy properties during trajectory formation.Psychological Review, 1988
- Segmentation and coupling in complex movements.Journal of Experimental Psychology: Human Perception and Performance, 1985