Fig. 1.

Spontaneous Up and Down states in mouse barrel cortex in vitro. A: example of spontaneous Up and Down states (the slow oscillation) in simultaneously recorded layer 5 pyramidal cell and fast-spiking interneuron. B: Up states recorded intracellularly are coincident with negative deflections of the infragranular local field potential (LFP). Fast oscillatory activity is evident in the band-pass filtered LFP (right). A and B, insets: action potentials are truncated. Example recordings are from slices from PV-tdTomato mice.