FIG. 4.

Signals recorded from area C1 of the thalamocortical model while the simulated levels of arousal promoting neuromodulators are decreased, producing a transition from waking to sleep. A: the level of arousal promoting neuromodulation, which is gradually decreased from waking to sleep levels during the simulation. B: an electroencephalographic (EEG)-like recording showing the transition from low-voltage fast activity to slow wave like behavior. C: the membrane potential of 100 excitatory cells in L2/3. D: an intracellular-like recording of the membrane potential from a typical L2/3 excitatory cell.