Neural Correlates of Single- and Dual-Task Walking in the Real World

• Published in: Frontiers in human neuroscience Vol. 11; p. 460
• Main Authors: Pizzamiglio, Sara, Naeem, Usman, Abdalla, Hassan, Turner, Duncan L
• Format: Journal Article
• Language: English
• Published: Switzerland Frontiers Research Foundation 14.09.2017; Frontiers Media S.A
• Subjects: Biomarkers; Cognitive ability; EEG; Electrodes; Electroencephalography; Females; Gait; gait monitoring; Investigations; Kinematics; Laboratories; Locomotion; mobile brain-body imaging; multitasking; Neuroimaging; Neuroscience; Older people; Sensorimotor system; Smartphones; urban environment; Walking; United Kingdom > UK; mobile brain-body imaging; gait monitoring; urban environment; EEG; multitasking; neuroimaging
• ISSN: 1662-5161; 1662-5161
• DOI: 10.3389/fnhum.2017.00460

Recent developments in mobile brain-body imaging (MoBI) technologies have enabled studies of human locomotion where subjects are able to move freely in more ecologically valid scenarios. In this study, MoBI was employed to describe the behavioral and neurophysiological aspects of three different commonly occurring walking conditions in healthy adults. The experimental conditions were self-paced walking, walking while conversing with a friend and lastly walking while texting with a smartphone. We hypothesized that gait performance would decrease with increased cognitive demands and that condition-specific neural activation would involve condition-specific brain areas. Gait kinematics and high density electroencephalography (EEG) were recorded whilst walking around a university campus. Conditions with dual tasks were accompanied by decreased gait performance. Walking while conversing was associated with an increase of theta (θ) and beta (β) neural power in electrodes located over left-frontal and right parietal regions, whereas walking while texting was associated with a decrease of β neural power in a cluster of electrodes over the frontal-premotor and sensorimotor cortices when compared to walking whilst conversing. In conclusion, the behavioral "signatures" of common real-life activities performed outside the laboratory environment were accompanied by differing frequency-specific neural "biomarkers". The current findings encourage the study of the neural biomarkers of disrupted gait control in neurologically impaired patients.