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Published in: Brain Topography 4/2018

01-07-2018 | Original Paper

Cognitive Processing for Step Precision Increases Beta and Gamma Band Modulation During Overground Walking

Authors: Anderson Souza Oliveira, Federico Gabriel Arguissain, Ole Kæseler Andersen

Published in: Brain Topography | Issue 4/2018

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Abstract

The aim of this study was to investigate whether cognitive processing for defining step precision during walking could induce changes in electrocortical activity. Ten healthy adults (21–36 years) were asked to walk overground in three different conditions: (1) normal walking in a straight path (NW); (2) walking in a pre-defined pathway forcing variation in step width and length by stepping on green marks on the floor (only one color: W1C), and (3) walking in the same pre-defined W1C pathway while evaluating different combinations among the colors green, yellow and red, in which only one color was the footfall target (evaluating two colors: W2C). Walking speed, stride duration and scalp electroencephalography (EEG) were recorded from all conditions. Event-related spectral perturbation was calculated for channels Fz, Cz, C3, C4, Pz and Oz in each condition, which were all time-normalized in relation to the gait cycle. The results showed that walking speed was reduced and stride duration was increased for W2C when compared to both NW and W1C (p < 0.01). Moreover, Event-related spectral perturbation analysis revealed significant changes (p < 0.05) during mid-stance in the frontal lobe and motor/sensorimotor regions, a phase in the gait cycle in which participants define the correct foot placement for the next step. These results suggest that greater cognitive demands during precision stepping influences electrocortical dynamics especially towards step transitions. Therefore, increased electrocortical activity in cognitive, motor and sensorimotor areas may be relevant to produce patterned and safe locomotion through challenging paths.
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Metadata
Title
Cognitive Processing for Step Precision Increases Beta and Gamma Band Modulation During Overground Walking
Authors
Anderson Souza Oliveira
Federico Gabriel Arguissain
Ole Kæseler Andersen
Publication date
01-07-2018
Publisher
Springer US
Published in
Brain Topography / Issue 4/2018
Print ISSN: 0896-0267
Electronic ISSN: 1573-6792
DOI
https://doi.org/10.1007/s10548-018-0633-z

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