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Electroencephalograms (EEG) are electrical brain maps which arise as a result of neuronal activity occurring in the cortical region of human brain. These EEG signals on the scalp surface associated with cognition and motor response of brain and are a useful guide to study human behavior and its association with the underlying brain dynamics. Appearance of EEG activity as a result of some specific cognitive or motor event is an event-related activity and associated potential is known as Event-Related-Potential (ERP). Sensorimotor process related to motor activity or sensor recognition involving multiple cortical regions of the brain is the most critical and complex brain activity. To study such inter-related cortical excitations, we present event-related-synchronization (ERS) and event-related desynchronization (ERD) analysis of motor hand movement activity paradigm conducted 10 healthy human subjects. A predefined trial sequence is presented to the subjects and EEG signals are recorded on primary motor area C3, C4 are obtained in a non-invasive manner. Phase synchronization of recorded EEG signals at channels C3, C4 are determined. High phase coherence is observed for left hand movement on C3, C4 contralateral electrodes with a correlation coefficient of 0.6922 and for right hand movement correlation coefficient is 0.6561. EEG signals on two electrodes remain phase locked for duration of 300 – 500 ms. Spectral analysis reveals spectral band in alpha rhythm (8-13 Hz), for average values of frequency with 11.613 Hz for left-hand movement and 11.305 Hz for right-hand movement. EEG signals at other electrode positions show less or no phase synchronization for hand movement motor execution paradigm.
Rizwan Ur Rehman, Jahangir Muhammad, Sitwat Qureshi, Tanweer Iqbal, Imran Siddiqui, Syed Zeeshan Abbas. (2020) PHASE SYNCHRONIZATION ANALYSIS OF SENSORIMOTOR CORTEX ELECTROENCEPHALOGRAMS FOR CHANNELS C3 AND C4, , Volume 17, Issue 3.
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