Blood oxygenation changes resulting from subthreshold high frequency repetitive transcranial magnetic stimulation

The feasibility of utilizing concurrent electroencephalography (EEG) and functional Near infrared spectroscopy (fNIRS) recording to characterize the difference in cortical activities between stroke patients (n=3) and healthy controls (n=3) was evaluated with a motor execution task. The asymmetry indicators, including inter-hemispheric sample entropy (IHI_En) derived from EEG signal and inter-hemispheric Oxygenated hemoglobin (IHI_HbO) concentration change derived from the fNIRS signal were extracted and compared. The IHI_En and IHI_HbO showed an observable difference between the stroke patients and healthy control group. The preliminary results demonstrated the feasibility of utilizing the concurrent EEG-fNIRS approach to assess the recovery progress of post-stroke patients with motor impairment.