Age-related Changes In The Brain Functional Connectivity During Motor Initiation
The effect of healthy aging on the human motor system performance is well-documented. It causes a decline in reaction time, degraded ability to execute and control complex motor actions, low flexibility in learning new skills. A reduced daily activity old people combined with a cognitive and motor decline, usually result in a developed ambidexterity, i.e., the loss of a dominant limb advances. We suggest that weakening of the neuronal processes associated with a dominant limb control should be observed at the early stage of motor initiation. In this paper we apply functional connectivity analysis to reveal age-related changes in the integrative brain dynamics during the motor initiation before the dominant hand movements. Analyzing the whole-scalp electroencephalography (EEG) signals on the sensor level, we find higher theta-band coupling in the hemisphere ipsilateral to the dominant hand.
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