Effective Connectivity Patterns During Bilateral and Mirror-Induced Unilateral Hand Movements: An EEG Source-Level Study
DOI:
https://doi.org/10.31185/wjes.Vol14.Iss2.870Keywords:
EEG, EMG, Effective Connectivity, Mirror-BoxAbstract
This study explores the effective connectivity patterns of underlying two visuomotor processing tasks: bilateral hand movement and unilateral hand movement with mirror-box. Electroencephalography and electromyography data were recorded using 44 and 2 electrodes respectively from 20 healthy participants while they performed the two tasks. Data were first preprocessed though epoching, band-pass filtering (1-45Hz), artifact rejection, Independent Component Analysis, and source localization. Then a connectivity pattern estimators known as direct Directed Transfer Function were utilized to calculate the directed information flow amongst brain signal sources. The results identified distinct task- and frequency-dependent effective connectivity across visual, parietal, and sensorimotor regions. Such that, Beta-band coupling dominated during bilateral hand movements, while alpha-band connectivity decreased during mirror-box tasks. These findings support utilizing source-localized Electroencephalography to investigate dynamic neural interaction to guide and to monitor rehabilitation therapies.
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