Differential Complexity of Information Processing during Motor Imagination in Adults versus Children
چکیده:
Motor imagination is a dynamic mental state that simulates a similar brain mechanism of actual physical movement. This brain mechanism could be traced using EEG recording during motor imagination. Nevertheless, it is still unclear that how development changes this mechanism. Considering the fact that brain mechanism of motor imagination must gain expertise during development to enable a subject performing better motor actions, therefore, we hypothesized that brain mechanism of imagination in adults must have more complex pattern of information processing as compared to the one in children. Therefore, EEG signals of 10 boys and 9 male-adults were recorded during right and left hand-motor imaginations. Subsequently, complexity of EEG signals were estimated by applying Higuchi’s fractal dimension (HFD) on the cleaned EEG data. The results presented a significant increase of HFD in the adults (P value < .05, family-wised error corrected) in all the EEG channels, as compared to the children. Increase of HFD presents a more complex pattern of information processing in adults which advances them for performing the motor tasks. This advancement in the adults could be created by compression of information in higher levels as compared to the children. We hope this findings pave the way to better understanding of brain functions and mechanism.
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