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Experimental Brain Research

, Volume 233, Issue 12, pp 3349–3357 | Cite as

Quick foot placement adjustments during gait: direction matters

  • Wouter HoogkamerEmail author
  • Zrinka Potocanac
  • Jacques Duysens
Research Article

Abstract

To prevent falls, adjustment of foot placement is a frequently used strategy to regulate and restore gait stability. While foot trajectory adjustments have been studied during discrete stepping, online corrections during walking are more common in daily life. Here, we studied quick foot placement adjustments during gait, using an instrumented treadmill equipped with a projector, which allowed us to project virtual stepping stones. This allowed us to shift some of the approaching stepping stones in a chosen direction at a given moment, such that participants were forced to adapt their step in that specific direction and had varying time available to do so. Thirteen healthy participants performed six experimental trials all consisting of 580 stepping stones, and 96 of those stones were shifted anterior, posterior or lateral at one out of four distances from the participant. Overall, long-step gait adjustments were performed more successfully than short-step and side-step gait adjustments. We showed that the ability to execute movement adjustments depends on the direction of the trajectory adjustment. Our findings suggest that choosing different leg movement adjustments for obstacle avoidance comes with different risks and that strategy choice does not depend exclusively on environmental constraints. The used obstacle avoidance strategy choice might be a trade-off between the environmental factors (i.e., the cost of a specific adjustment) and individuals’ ability to execute a specific adjustment with success (i.e., the associated execution risk).

Keywords

Falls Locomotion Obstacle avoidance Online corrections Stepping accuracy Walking 

Notes

Acknowledgments

We thank Sjoerd Bruijn, Masood Mazaheri and Melvyn Roerdink for helpful suggestions and stimulating discussions. Special thanks are also due to Marike Odeyn and Christophe Delvaux for assistance with data acquisition and analysis. This work was supported by Research Foundation-Flanders (FWO; Grants G.0756.10 and G.0901.11). JD has been funded by the Interuniversity Attraction Poles Program initiated by the Belgian Science Policy Office (P7/11) and received a Visiting Professor Grant from the National Research Council of Brazil (CNPq 400819/2013-9). ZP was funded by the European Commission through MOVE-AGE, an Erasmus Mundus Joint Doctorate Programme (2011-0015).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Wouter Hoogkamer
    • 1
    Email author
  • Zrinka Potocanac
    • 1
  • Jacques Duysens
    • 1
    • 2
  1. 1.Department of Kinesiology, Movement Control and Neuroplasticity Research GroupKU LeuvenLouvainBelgium
  2. 2.Biomechatronics Lab, Mechatronics DepartmentEscola Politécnica da Universidade de São PauloSão PauloBrazil

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