Research Article

Quantification of Upper Limb Motor Recovery and EEG Power Changes after Robot-Assisted Bilateral Arm Training in Chronic Stroke Patients: A Prospective Pilot Study

Figure 4

Laterality index (LI) in alpha and beta bands at each evaluation time point (T0, T1, and T2). LI was calculated considering contralateral (ipsilesional) ERD as the C3 ERD value over the left sensorimotor area and ipsilateral (contralesional) ERD as the C4 ERD over the right sensorimotor area. LI > 0 indicates contralateral ERD and LI < 0 indicates ipsilateral ERD.