Document Type : Research Paper
Authors
1 Ph.D. Candidate, Department of Behavioral Sciences and Cognitive and Sports Technology, Shahid Beheshti University, Tehran, Iran
2 Assistant Professor, Department of Motor Behavior, Shahid Beheshti University, Tehran, Iran
3 Institute for Cognitive and Brain Sciences Department, Shahid Beheshti University
4 Professor, Department of Behavioral Sciences and Cognitive and Sports Technology, Shahid Beheshti University, Tehran, Iran
Abstract
This study aimed to investigate the effect of vision manipulation on older adults' posture control and cerebral cortex functions. Sixty healthy elderly (68.23 ± 4.32 years old) participated in this study. Participants performed static posture control during EEG recording. In this study, twenty-four electrodes were used to record electroencephalography signals. After visually identifying and removing noise, independent component analysis (ICA) and processing techniques were used to identify and remove biological and environmental artifacts such as eye blinks and electromyography (EMG). ICA was applied to the data utilizing EEGlab (2023)-based MATLAB (R2023b) scripts. According to the results of the mixed-ANOVA test 4 (balance task) * (5) frequency band * (24) channels, the cerebral cortex actively participated significantly in posture control (P=0.0001). This participation was evident in both eyes open and closed conditions. The somatosensory, parietal, left occipital, temporal, central-occipital, and parietal-occipital cortex generate cortical wave oscillations associated with static posture control. In static postural control, bounding eyesight did not lead to a shift in posture control from the cortical surface to the subcortical structure did not change during eye-closed postural control. Older adults may use different strategies in postural control. It seems that conscious control at the cortical level is preferable to automatic control or subcortical levels in the static posture control of the elderly. Increasing cortical activity is a strategy to compensate for age-related decline.
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