Table 1.
Mean Log10 Delta and Slow-Oscillatory Power Spectral Density Relative to Auditory Stimulation
| Within-Condition Comparisons | ||||||
|---|---|---|---|---|---|---|
| Study Condition | Power Frequency Range | Pre-Stimulus Baseline | Stimulation | df | t | p |
| (5 sec)a | (10 sec)a | |||||
| Enhancing | 0.5–4 Hz (Delta) | 1.66 (0.04) | 1.76 (0.03) | 7 | 4.91 | .002 |
| 0.5–1 Hz (SO) | 1.94 (0.04) | 2.08 (0.03) | 7 | 5.52 | <.001 | |
| Disruptive | 0.5–4 Hz (Delta) | 1.54 (0.05) | 1.67 (0.06) | 7 | 5.49 | .001 |
| 0.5–1 Hz (SO) | 1.78 (0.06) | 1.95 (0.07) | 7 | 6.04 | <.001 | |
| Between-Condition Comparisons | ||||||
| Time Window | Power Frequency Range | Disruptivea | Enhancinga | df | t | p |
| Pre-stimulus baseline (5 sec) |
0.5–4 Hz (Delta) | 1.54 (0.05) | 1.66 (0.04) | 7 | 4.03 | .005 |
| 0.5–1 Hz (SO) | 1.78 (0.06) | 1.94 (0.04) | 7 | 4.39 | .003 | |
| Stimulation period (10 sec) |
0.5–4 Hz (Delta) | 1.67 (0.06) | 1.76 (0.03) | 7 | 2.60 | .035 |
| 0.5–1 Hz (SO) | 1.95 (0.07) | 2.08 (0.03) | 7 | 2.62 | .034 | |
| Change from pre-stimulus baseline to stimulation | 0.5–4 Hz (Delta) | 0.13 (0.02) | 0.10 (0.02) | 7 | 0.90 | .396 |
| 0.5–1 Hz (SO) | 0.18 (0.03) | 0.14 (0.02) | 7 | 1.18 | .278 | |
Notes: Upper panel: mean log10 delta (0.5–4 Hz) and slow-oscillatory (0.5–1 Hz) power spectral density within each study condition, during auditory stimulation (10 sec) relative to the 5-sec baseline period preceding stimulation. Lower panel: differences in power spectral density between Disruptive and Enhancing study condition nights, within the 5-sec pre-stimulus baseline period, 10-sec stimulus period, and the pre-stimulus to stimulation change. Power within a frequency range was calculated across all stimuli initiated during stages N2 and N3 within a study condition (Enhancing or Disruptive) and at all sound pressure levels. aMean (standard error of the mean). p-values in bold are interpreted as significant (p < .05).
Abbreviation: SO, slow oscillation.