Figure 4. Results for sheep data.

(A) Local field potential recorded from 64 channels. Time 0 is the starting point of stimuli. (B) Spatial-temporal pattern of theta power distribution (−500 to 500 ms) across the recording array for one experimental session in response to face presentation. Electrodes are arranged by the latency of the normalized theta power. The electrodes with increased power are marked by the filled colour on the electrode grid in different time slots of 50 ms in the duration 100–400 ms. (C) Partial Granger causality of all possible relationships in time domain. (D) The inferred structure from experimental data in the time domain. (E) The frequency decomposition of all possible relationship is consistent with the structure inferred from time domain.