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• W1851352561 abstract "Walking on two legs is inherently unstable. Still, we humans perform remarkable well at it, mostly without falling. To gain more understanding of the role of the brain in controlling gait stability we measured brain activity using electro-encephalography (EEG) during stabilized and normal walking. Subjects walked on a treadmill in two conditions, each lasting 10 min; normal, and while being laterally stabilized by elastic cords. Kinematics of trunk and feet, electro-myography (EMG) of neck muscles, as well as 64-channel EEG were recorded. To assess gait stability the local divergence exponent, step width, and trunk range of motion were calculated from the kinematic data. We used independent component (IC) analysis to remove movement, EMG, and eyeblink artifacts from the EEG, after which dynamic imaging of coherent sources beamformers were determined to identify cortical sources that showed a significant difference between conditions. Stabilized walking led to a significant increase in gait stability, i.e., lower local divergence exponents. Beamforming analysis of the beta band activity revealed significant sources in bilateral pre-motor cortices. Projection of sensor data on these sources showed a significant difference only in the left premotor area, with higher beta power during stabilized walking, specifically around push-off, although only significant around contralateral push-off. It appears that even during steady gait the cortex is involved in the control of stability." @default.
• W1851352561 created "2016-06-24" @default.
• W1851352561 creator A5009184962 @default.
• W1851352561 creator A5036424119 @default.
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• W1851352561 date "2015-10-27" @default.
• W1851352561 modified "2023-10-12" @default.
• W1851352561 title "Beta activity in the premotor cortex is increased during stabilized as compared to normal walking" @default.
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• W1851352561 doi "https://doi.org/10.3389/fnhum.2015.00593" @default.
• W1851352561 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4621867" @default.
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• W1851352561 hasPublicationYear "2015" @default.
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