Topic: chaotic phase

The temporal activity of neural circuits exhibits fluctuations simultaneously varying over a large range of timescales (Murray et al. 2014). Recent experimental evidence presents a heterogeneity of timescales across neurons within the same local cortical circuit, ranging from milliseconds to minutes (Bernacchia et al. 2011). While this phenomenon is well documented, the underlying neural mechanism is still unknown. We present a novel random neural network whose units represent functional neural clusters of different sizes, given by a heterogeneous distribution of self-couplings. We find that t