Figure 4.

The time courses and dipole strengths of the ipsilateral premotor area (PMA), contralateral primary motor area (M1), and SMA due to finger lifting using the non‐dominant left hand (A–C) and the dominant right hand (D–F) for eight subjects. Time courses are color‐coded for each subject. Peak latencies of the sources for each subject are indicated by the vertical lines. Time courses of the contralateral M1 source (B and E) showed another visible weak peak (arrow), which was earlier than were the strongest peaks.