journal article Open Access May 18, 2023

Electrocortical Dynamics of Usual Walking and the Planning to Step over Obstacles in Parkinson’s Disease

Sensors Vol. 23 No. 10 pp. 4866 · MDPI AG
View at Publisher Save 10.3390/s23104866
Abstract
The neural correlates of locomotion impairments observed in people with Parkinson’s disease (PD) are not fully understood. We investigated whether people with PD present distinct brain electrocortical activity during usual walking and the approach phase of obstacle avoidance when compared to healthy individuals. Fifteen people with PD and fourteen older adults walked overground in two conditions: usual walking and obstacle crossing. Scalp electroencephalography (EEG) was recorded using a mobile 64-channel EEG system. Independent components were clustered using a k-means clustering algorithm. Outcome measures included absolute power in several frequency bands and alpha/beta ratio. During the usual walk, people with PD presented a greater alpha/beta ratio in the left sensorimotor cortex than healthy individuals. While approaching obstacles, both groups reduced alpha and beta power in the premotor and right sensorimotor cortices (balance demand) and increased gamma power in the primary visual cortex (visual demand). Only people with PD reduced alpha power and alpha/beta ratio in the left sensorimotor cortex when approaching obstacles. These findings suggest that PD affects the cortical control of usual walking, leading to a greater proportion of low-frequency (alpha) neuronal firing in the sensorimotor cortex. Moreover, the planning for obstacle avoidance changes the electrocortical dynamics associated with increased balance and visual demands. People with PD rely on increased sensorimotor integration to modulate locomotion.
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Metrics
12
Citations
50
References
Details
Published
May 18, 2023
Vol/Issue
23(10)
Pages
4866
License
View
Funding
Sao Paulo Research Foundation Award: 2014/22308-0
Coordenaçaõ de Aperfeiçoamento de Pessoal de Nível Superior—Brasil Award: 2014/22308-0
Cite This Article
Rodrigo Vitorio, Ellen Lirani-Silva, Diego Orcioli-Silva, et al. (2023). Electrocortical Dynamics of Usual Walking and the Planning to Step over Obstacles in Parkinson’s Disease. Sensors, 23(10), 4866. https://doi.org/10.3390/s23104866
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