Table 1.
Statistics on phase coherence between local field potentials and the wideband stimulus envelope for the population of cortical sites
| % sites |
t statistic |
% enhancement |
Mean ± SD coherence |
||||
|---|---|---|---|---|---|---|---|
| Minimum | Maximum | Minimum | Maximum | Intact | Shuffled | ||
| Savanna (5–7 Hz) | 43 | 4.06 | 21.98 | 12.5 | 91 | 0.65 ± 0.11 | 0.46 ± 0.07 |
| Riverine forest (23–27 Hz) | 35 | 4.46 | 37.74 | 10 | 112 | 0.66 ± 0.11 | 0.42 ± 0.03 |
| Rainforest (0–20 Hz) | 45 | 4.2 | 33.86 | 5 | 73 | 0.53 ± 0.06 | 0.43 ± 0.04 |
% sites refers to the percentage of sites with significant differences between intact and shuffled phase coherence in a given frequency band. t statistic refers to the t value obtained by a two-sample t test between intact and shuffled phase coherence in relevant frequency bands for each scene. % enhancement refers to the enhancement of intact phase coherence over the shuffled phase coherence. Mean coherence refers to the mean across all cortical sites in the specified frequency band. p < 0.005 for all tests.