Broadband Spectral Change: Evidence for a Macroscale Correlate of Population Firing Rate?: Figure 1.

In 1972, Brindley and Craggs1 measured the electric potential from the surface of the baboon brain using a 1-mm-diameter electrode. They found that the power in the 80–250 Hz frequency range of the electric potential time series was dynamically increased in motor areas during movement. Sites 2