Skip to Main content Skip to Navigation
Journal articles

Testing the role of expansion in the prospective control of locomotion.

Abstract : The constant bearing angle (CBA) strategy is a prospective strategy that permits the interception of moving objects. The purpose of the present study is to test this strategy. Participants were asked to walk through a virtual environment and to change, if necessary, their walking speed so as to intercept approaching targets. The targets followed either a rectilinear or a curvilinear trajectory and target size was manipulated both within trials (target size was gradually changed during the trial in order to bias expansion) and between trials (targets of different sizes were used). The curvature manipulation had a large effect on the kinematics of walking, which is in agreement with the CBA strategy. The target size manipulations also affected the kinematics of walking. Although these effects of target size are not predicted by the CBA strategy, quantitative comparisons of observed kinematics and the kinematics predicted by the CBA strategy showed good fits. Furthermore, predictions based on the CBA strategy were deemed superior to predictions based on a required velocity (V (REQ)) model. The role of target size and expansion in the prospective control of walking is discussed.
Document type :
Journal articles
Complete list of metadata

Cited literature [40 references]  Display  Hide  Download
Contributor : Marc Savasta Connect in order to contact the contributor
Submitted on : Monday, January 11, 2010 - 12:05:34 PM
Last modification on : Tuesday, May 3, 2022 - 6:18:17 PM
Long-term archiving on: : Wednesday, November 30, 2016 - 10:07:47 AM


 Restricted access
To satisfy the distribution rights of the publisher, the document is embargoed until : jamais

Please log in to resquest access to the document




Julien Bastin, David M. Jacobs, Antoine H. P. Morice, Cathy Craig, Gilles Montagne. Testing the role of expansion in the prospective control of locomotion.. Experimental Brain Research, Springer Verlag, 2008, 191 (3), pp.301-12. ⟨10.1007/s00221-008-1522-6⟩. ⟨inserm-00410933⟩



Record views