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, first paper having shown the dynamics of slow-wave sleep intracellularly in cats, where the Down-states are clearly associated with cellular hyperpolarization, while Up-states are intracellularly very close to the dynamics found during wakefulness

?. Ref, evidence for a regulation of the firing of neurons between Wake and 180 SWS states, where neurons with high levels of firing tend to fire lower during SWS, and conversely, Figure 4: Difference in pairwise spike train cross-correlations among RS and FS cells during Wake and SWS. A)

, Spiking activity measured during ? oscillations through multielectrod arrays in two cortical areas in monkey (premotor dorsal, PMd, and motor neocortical, MI)

. Blue, Note that FS cells (exemplified by cells 57 and 69) display synchronous activity even with cell recorded in another cortical area (M1). a3) Spike cross-correlogram between cells 57 and 69 during SWS and Wake states. A significant peak is observed only during SWS. Figure A was adapted from, vol.11

, B) Empirical probability distributions of human spiking activity are compared with the ones predicted by Maximum Entropy model (see main text), both in Wake (b1) and SWS (b2) for two type of cells (FS and RS)