Fig. 6. Polynomial fits of the time course of θ-band power after bolus injection of etomidate in the hippocampus (A ) and prefrontal cortex (B ). The traces represent grand averages. Corresponding raw data are shown in figures 7A and B. (C ) In the β3(N26 5m) mutants, θ power reaches baseline levels within 3 min after etomidate administration. In wild types, this takes more than 15 min. The difference between wild types and mutants is statistically significant (**P < 0.01).