Figure 5.

Modulation of LFP power in seven frequency bands. LFP power in each of seven frequency bands averaged across the eight LFP channels from a single array in each monkey (A, monkey Y; B, monkey X) and normalized relative to baseline (= 1) is shown as a function of time for each of the movements performed by the monkey. For each movement, average power was computed at 50 ms intervals for data aligned separately on the cue, OM, and SH. Values plotted are the mean ± SE across the eight channels in the array. Movement-related changes in normalized power were largest in the 1–4, 5–13, 62–98, and 100–170 Hz bands. The low-frequency increases tended to peak around OM, whereas high-frequency increases tended to peak between OM and SH. Power in the 16–24 and 25–40 Hz bands decreased more prominently in monkey X than in monkey Y.