Therefore, for the pressing task, the PAC values in the movement epochs were grouped into five periods at cortical level. These included: P1 (prepress onset period: from 200 ms before the movement onset to the movement onset), P2 (postpress onset period: from the movement onset until the end of the force build-up), P3 (sustained press period: from the end of the force build-up to the start of the force release), P4 (release period: from the start of finger release to the movement offset), and P5 (postoffset period: from the movement offset to 200 ms after the movement offset).
