Paper Info
Title
Cognitive Perturbations Affect Brain Cortical Activity And Postural Control: An Investigation Of Human Eeg And Motion Data
Abstract
Biomechanical analyses recognize the role of cognitive loads in postural stability by measuring body sway related parameters. However, the simultaneous investigation of the neural and motor behavior during control of the posture is limited. The present study investigated the effects of cognitive load addition on postural control and status of topographical brain activity in quiet and perturbed standing. Sixteen healthy young people participated in four main levels of the experiment, including two levels of physical difficulty with and without math questions in the form of mental calculations. Cortical electrical activity and postural sways were recorded simultaneously using a 19-channel electroencephalography and motion analysis method to measure body movements by a highspeed camera and active markers. Analysis of variance showed significant effects of the cognitive perturbation on theta band energy of the frontal (p < .001) and temporal (p = .030) regions. Approximate entropy metrics of the brain frontal activity and also the movements of the center of mass were reduced by cognitive loads (p < .05). The energy of theta band EEG signals was positively correlated to the overall mechanical work in easier tasks (r = 0.59), and the CoM stability metrics in the more difficult tasks (r > 0.57). Addition of the cognitive loads to a postural task reduced the stability by higher levels of brain cortex involvement. Addition of the second cognitive task to standing reduced the complexity of both neural and motor activities. The neuro-motor collaboration in maintenance of balance was interfered with the arithmetic cognitive loads.
Year
DOI
Venue
2021
10.1016/j.bspc.2021.102955
BIOMEDICAL SIGNAL PROCESSING AND CONTROL
Keywords
DocType
Volume
Cognitive perturbation, Stability, Postural control, Brain cortical activity, Electroencephalography, Center of mass
Journal
69
ISSN
Citations 
PageRank 
1746-8094
0
0.34
References 
Authors
0
3
Name
Order
Citations
PageRank
Maedeh Najafi Ashtiani100.34
Mohammed N. Ashtiani200.34
Mohammadreza Asghari Oskoei300.34