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Assessment of the effect of the time of day on EEG frequency bands.
| Band | Eyes open/closed | Type of relationship with time | P value for relationship with time |
|---|---|---|---|
| θ | Eyes open | Cubic | 0.001 |
| Eyes closed | Quartic | 0.046 | |
| β1 | Eyes open | Cubic | < 0.001 |
| Eyes closed | Cubic | 0.007 | |
| α1 | Eyes open | Cubic | < 0.001 |
| Eyes closed | Quadratic | 0.031 |
