Topic: oscillatory diversity

Theta and gamma oscillations are believed to organise hippocampal activity and function. The current dominant view posits the existence of two gamma frequency sub-bands, occurring at different theta phases in CA1, produced by different generators and sub-serving exclusive cognitive operations. Such views are however grounded on averaging over many oscillatory events. Here, we explore agnostically the diversity of individual theta-gamma bursts and find, in striking contrast with the discrete sub-bands hypothesis, that gamma bursts with nearly every combination of frequency, amplitude and theta-