caa a22 4500 44535139X CHVBK 20180317142845.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s00221-011-2619-x doi (NATIONALLICENCE)springer-10.1007/s00221-011-2619-x Invariance of locomotor trajectories across visual and gait direction conditions [Elektronische Daten] [Quang-Cuong Pham, Alain Berthoz, Halim Hicheur] We studied the influence of vision (walking with or without vision) and of gait direction (walking forward or backward) on goal-oriented locomotion in humans. Subjects had to walk, in a free environment, from a given position and orientation towards a distant arrow which constrained their final position and orientation. We found that the average trajectories were mostly similar across the tested conditions, which suggests that locomotor trajectories are generated at a high cognitive level and, to some extent, independently of the detailed sensory and motor implementation levels. The variability profiles around the average trajectories were similar across the gait direction conditions but differed greatly across the visual conditions, indicating the existence of motor-independent and vision-dependent control mechanisms. Taken together, our observations argue further in favour of a top-down implementation of goal-oriented locomotion, where the control of locomotion is specified at the level of whole-body trajectories and then implemented through specific motor strategies. Springer-Verlag, 2011 Human locomotion nationallicence Vision nationallicence Backward walking nationallicence Invariance nationallicence Locomotor trajectories nationallicence CNS : Central nervous system nationallicence VF : Vision forward nationallicence NF : No-vision forward nationallicence VB : Vision backward nationallicence NB : No-vision backward nationallicence TD : Trajectory deviation nationallicence MTD : Maximum trajectory deviation nationallicence VD : Velocity deviation nationallicence TS : Trajectory separation nationallicence MTS : Maximum trajectory separation nationallicence TL : Trajectory length nationallicence Pham Quang-Cuong Laboratoire de Physiologie de la Perception et de l'Action, Collège de France CNRS, UMR 7152, 11 place Marcelin Berthelot, 75005, Paris, France aut Berthoz Alain Laboratoire de Physiologie de la Perception et de l'Action, Collège de France CNRS, UMR 7152, 11 place Marcelin Berthelot, 75005, Paris, France aut Hicheur Halim Department of Cognitive Neurology, Hertie Institute for Clinical Brain Research, University Clinic Tuebingen, Tuebingen, Germany aut Experimental Brain Research Springer-Verlag 210/2(2011-04-01), 207-215 0014-4819 210:2<207 2011 210 221 https://doi.org/10.1007/s00221-011-2619-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00221-011-2619-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pham Quang-Cuong Laboratoire de Physiologie de la Perception et de l'Action, Collège de France CNRS, UMR 7152, 11 place Marcelin Berthelot, 75005, Paris, France aut NATIONALLICENCE 700 1- Berthoz Alain Laboratoire de Physiologie de la Perception et de l'Action, Collège de France CNRS, UMR 7152, 11 place Marcelin Berthelot, 75005, Paris, France aut NATIONALLICENCE 700 1- Hicheur Halim Department of Cognitive Neurology, Hertie Institute for Clinical Brain Research, University Clinic Tuebingen, Tuebingen, Germany aut NATIONALLICENCE 773 0- Experimental Brain Research Springer-Verlag 210/2(2011-04-01), 207-215 0014-4819 210:2<207 2011 210 221 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer