Fig. 2.

EEG waveform recorded over the Cz electrode during pedaling. The arrows indicate the time within the pedaling cycle when the corresponding 2-D topographic maps were generated. In the 2-D maps, the nose is pointing upwards, left and right ears are on the left and right side respectively. Blue indicates relative negativity and red indicates relative positivity. (a) The active pedaling condition for a single subject. (b) The passive pedaling condition for a single subject, in which the researcher turned the crank. (c) The group average active pedaling condition. (d) The group average passive pedaling condition. The 2-D maps were generated using Scan 4.3 (Compumedics Neuroscan).