Fig. 5

(A) ERD time course (2 to 5 s) over the C3 electrode in the beta band expressed as percent change; the motor imagery task lasted between 2 and 5 s. (B) Time-frequency cortical maps in the beta band during the motor imagery (MI) task with different feedbacks. (C) Statistical analysis of C3 and C4 electrodes between conditions (IA: motor imagery alone, IO: motor imagery and action observation, IV: motor imagery and focal vibration, IOV: motor imagery and action observation and focal vibration)