Figure 2.

Results for the dowel-low task. (A) Grand average Z-transformed FDI-EEG coherence head map for the dowel-low task with all electrode locations marked. The four electrodes used for statistical analyses were C1, C3, CP1, and CP3 (labeled) with respective Z-transformed coherence values of 4.81, 5.26, 4.66, and 4.54. The cluster of electrodes appears over the left sensorimotor cortex. (B) Average coherence spectra of the four electrodes shown in (A) for the spring-high (blue trace) and dowel-high (orange trace) tasks. The beta frequency band (15–30 Hz) is shown as the gray shaded area. Peak coherence of the average for the spring-low condition was 4.59 at 21.05 Hz and for the dowel-high condition, 6.84 at 20.1 Hz.