p233fig05.42 Mismatch-induced beta oscillations have been reported in at least three parts of the brain: V1, V4, and hippocampus. Althpough there may be other reasons for beta oscillations in the brain, those that are caused by a mismatch should be studied in concert with the gamma oscillations that occur during a good enough match.  See tyhe text for details.<BR>||  Is there evidence for the [gamma, beta] prediction? Yes, in at least three parts of the brain, (Buffalo EA, Fries P, Ladman R, Buschman TJ, Desimone R 2011, PNAS 108, 11262-11267) Does this difference in average oscillation frequencies in the superficial and deep layers reflect layer 4 reset?  Superficial recording γ (gamma), Deep recording β (beta) (Berke etal 2008, hippocampus; Buschman and Miller 2009, FEF)