Table 1.
Mean (SDs in parentheses) amplitude (in μV), of N1, P2, and N350, measured at Cz, as a function of intensity of the auditory stimulus and stage of sleep.
| Intensity (dB nHL) | N1 |
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|---|---|---|---|---|---|
| Wake | sN2 early | sN3 | sN2 late | REM | |
| 45 | −4.88 (1.95) | +2.40 (2.00) | +1.52 (1.62) | +1.23 (1.70) | −0.82 (1.51) |
| 35 | −3.53 (1.53) | +0.44 (1.71) | +2.30 (2.02) | +0.66 (0.68) | −0.13 (0.89) |
| 25 | −2.92 (1.31) | +0.42 (1.43) | +1.66 (2.01) | +0.74 (1.22) | +0.32 (0.72) |
| 15 | −1.51 (1.27) | +0.86 (1.70) | +0.28 (1.59) | +0.52 (1.02) | +0.25 (0.42) |
| +5 | −1.65 (0.92) | +0.20 (0.89) | +0.12 (1.55) | +0.30 (1.03) | +0.03 (0.50) |
| −5 | +0.14 (0.84) | −0.16 (0.63) | −0.08 (0.93) | −0.24 (0.71) | −0.03 (0.36) |
| Intensity (dB nHL) | P2 |
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| Wake | sN2 early | sN3 | sN2 late | REM | |
| 45 | +2.81 (1.88) | +14.88 (5.09) | +14.80 (4.95) | +13.89 (3.55) | +5.58 (3.10) |
| 35 | +3.32 (1.99) | +6.19 (2.52) | +11.83 (4.87) | +6.49 (2.48) | +2.48 (1.86) |
| 25 | +1.10 (1.53) | +3.58 (1.72) | +8.81 (4.18) | +5.39 (1.35) | +2.20 (1.77) |
| 15 | +1.07 (0.81) | +3.54 (1.66) | +3.87 (2.69) | +2.32 (1.01) | +1.11 (1.42) |
| +5 | +0.39 (0.91) | +2.32 (1.06) | +0.16 (1.93) | +0.79 (1.85) | +0.63 (1.32) |
| −5 | +0.14 (0.82) | +0.37 (0.87) | −0.07 (1.52) | −0.28 (0.73) | +0.04 (0.36) |
| Intensity (dB nHL) | N350 |
||||
| Wake | sN2 early | sN3 | sN2 late | REM | |
| 45 | — | −14.61 (12.86) | −25.07 (22.86) | −16.02 (10.61) | −4.25 (1.08) |
| 35 | — | −5.77 (4.23) | −7.15 (9.67) | −2.91 (4.09) | −3.03 (0.74) |
| 25 | — | −2.79 (4.49) | −0.82 (7.73) | −2.33 (3.07) | −1.45 (0.32) |
| 15 | — | −1.21 (2.33) | −1.30 (4.61) | −1.03 (2.93) | −0.79 (0.42) |
| +5 | — | +0.45 (2.87) | −2.16 (4.83) | −0.79 (2.62) | −0.66 (0.36) |
| −5 | — | −0.32 (2.13) | +0.18 (3.80) | −0.28 (2.40) | −0.24 (0.53) |