Electrocortical correlates of human level-ground, slope, and stair walking
Publication Date
November 30, 2017
Authors
Trieu Phat Luu, Justin A. Brantley, Sho Nakagome, Fangshi Zhu, et al
Volume
12
Issue
11
Pages
e0188500
DOI
https://dx.plos.org/10.1371/journal.pone.0188500
Publisher URL
http://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0188500
Scopus
85036588215
Mendeley
http://www.mendeley.com/research/electrocortical-correlates-human-level-ground-slope-stair-walking
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Mendeley | Further Information

{"title"=>"Electrocortical correlates of human level- ground , slope , and stair walking", "type"=>"journal", "authors"=>[{"first_name"=>"Trieu Phat", "last_name"=>"Luu"}, {"first_name"=>"Justin A", "last_name"=>"Brantley"}, {"first_name"=>"Sho", "last_name"=>"Nakagome"}, {"first_name"=>"Fangshi", "last_name"=>"Zhu"}, {"first_name"=>"Jose L.", "last_name"=>"Contreras-Vidal"}], "year"=>2017, "source"=>"PLoS ONE", "identifiers"=>{"issn"=>"19326203", "isbn"=>"1111111111", "pmid"=>"29190704", "doi"=>"10.1371/journal.pone.0188500"}, "id"=>"76fe1070-d736-3fbd-bc6b-88fbafe81832", "abstract"=>"This study investigated electrocortical dynamics of human walking across different uncon-strained walking conditions (i.e., level ground (LW), ramp ascent (RA), and stair ascent (SA)). Non-invasive active-electrode scalp electroencephalography (EEG) signals were recorded and a systematic EEG processing method was implemented to reduce artifacts. Source localization combined with independent component analysis and k-means clustering revealed the involvement of four clusters in the brain during the walking tasks: Left and Right Occipital Lobe (LOL, ROL), Posterior Parietal Cortex (PPC), and Central Sensorimo-tor Cortex (SMC). Results showed that the changes of spectral power in the PPC and SMC clusters were associated with the level of motor task demands. Specifically, we observed α and β suppression at the beginning of the gait cycle in both SA and RA walking (relative to LW) in the SMC. Additionally, we observed significant β rebound (synchronization) at the initial swing phase of the gait cycle, which may be indicative of active cortical signaling involved in maintaining the current locomotor state. An increase of low γ band power in this cluster was also found in SA walking. In the PPC, the low γ band power increased with the level of task demands (from LW to RA and SA). Additionally, our results provide evidence that electrocortical amplitude modulations (relative to average gait cycle) are correlated with the level of difficulty in locomotion tasks. Specifically, the modulations in the PPC shifted to higher frequency bands when the subjects walked in RA and SA conditions. Moreover, low γ modulations in the central sensorimotor area were observed in the LW walking and shifted to lower frequency bands in RA and SA walking. These findings extend our understanding of cortical dynamics of human walking at different level of locomotion task demands and reinforces the growing body of literature supporting a shared-control paradigm between spi-nal and cortical networks during locomotion.", "link"=>"http://www.mendeley.com/research/electrocortical-correlates-human-level-ground-slope-stair-walking", "reader_count"=>18, "reader_count_by_academic_status"=>{"Unspecified"=>1, "Professor > Associate Professor"=>1, "Researcher"=>3, "Student > Ph. D. Student"=>6, "Student > Postgraduate"=>1, "Student > Master"=>5, "Student > Bachelor"=>1}, "reader_count_by_user_role"=>{"Unspecified"=>1, "Professor > Associate Professor"=>1, "Researcher"=>3, "Student > Ph. D. Student"=>6, "Student > Postgraduate"=>1, "Student > Master"=>5, "Student > Bachelor"=>1}, "reader_count_by_subject_area"=>{"Engineering"=>6, "Unspecified"=>2, "Agricultural and Biological Sciences"=>2, "Neuroscience"=>4, "Psychology"=>3, "Computer Science"=>1}, "reader_count_by_subdiscipline"=>{"Engineering"=>{"Engineering"=>6}, "Neuroscience"=>{"Neuroscience"=>4}, "Psychology"=>{"Psychology"=>3}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>2}, "Computer Science"=>{"Computer Science"=>1}, "Unspecified"=>{"Unspecified"=>2}}, "group_count"=>1}

Scopus | Further Information

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