Comparison of coherence in control and ELS rats as a function of age in PFC compared to the VH. (A) delta, (B) theta, (C) alpha, (D) beta and (E) gamma frequencies. E. Mean coherences across all ages for bandwidths delta, theta, alpha, beta and gamma frequencies. * = p<0.05, ** = p<0.01, *** = p<0.001, **** = p<0.0001.