Effects of a gait asymmetry on brain activity in healthy people

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Background: Recent findings in electroencephalography (EEG) research demonstrate the possibi measure event-related desynchronization (ERD) during walking. Findings show that ERD around motor cortex is coupled to the human gait cycle. Gait can be heavily impaired following cortica such as stroke. Locomotor brain activity is slightly shifted to the undamaged hemisphere in thes patients. To clarify the relationship between asymmetrical gait and a shift in brain activity in st patients it is important to study this relationship in healthy subjects first. Objective: To determine if a shift in gait-cycle provoked by a split-belt treadmill leads to a shif brain activity in the mu-band above the motor areas in healthy subjects. Methods: Eleven participants walked split-belt to create an asymmetrical gait-pattern. Two tied and two-split belt conditions were offered. EEG was recorded from 62 channels with the ground on the AFz-electrode position. Also marker data of the foot and EMG of the lower limbs was me Electrodes C3 and C4 were used to calculate lateralized power and ERD in the mu-band was visu by topographies of spatial distributions of the whole head. Results: No significant difference in lateralized power was found between the different conditio Topographies of the spatial distributions did not show an ERD above the motor areas. Conclusion: Brain activity during split-belt walking does not differ significantly from brain activ during tied-belt walking.
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