Figure 4.

The local field potential (LFP) of activity recorded from a large scale model of the thalamocortical system under conditions of high (A,C) and low (B,D) synaptic strength. C and D depict individual slow-wave detections (thicker line segments) on the band-pass-filtered signal (0.5–2 Hz) for the high- and low-synaptic-strength conditions, respectively. It is clear that detected slow waves constitute most of the signal. The autocorrelations (E) of the LFPs show the reduction in slow oscillatory activity with the decrease in synaptic strength. F depicts a representative slow wave. The first and second segment of the slow wave are indicated between the negative peaks below the zero crossing (*) and the positive peak (**).