Table 2.
Sleep parameters
| Sleep parameter | SWS | REM | |||||
|---|---|---|---|---|---|---|---|
| SO density (number per minute) | SO amplitude (mV) | Spindle density (number per minute) | Spindle power (mV2/s) | Spindle mean duration (s) | Theta power (mV2/s) | Total theta energy (mV2/s) | |
| Vehicle | 5.63 ± 0.78 | 0.230 ± 0.020 | 2.37 ± 0.13 | 0.03 ± 0.002 | 0.58 ± 0.007 | 0.026 ± 0.002 | 8.33 ± 1.31 |
| Muscimol | 5.70 ± 0.81 | 0.225 ± 0.022 | 2.28 ± 0.12 | 0.03 ± 0.003 | 0.58 ± 0.01 | 0.021 ± 0.002 | 4.60 ± 1.60 |
| Group comparison |
t (9) = −0.92, P = 0.38 |
t (9) = 0.07, P = 0.95 |
t (9) = 0.70, P = 0.50 |
t (9) = 0.92, P = 0.37 |
t (9) = 0.07, P = 0.95 |
t (9) = 2.67, P = 0.032 |
t (9) = 2.03, P = 0.07 |
Sleep parameters for the postencoding sleep condition in rats with functioning (vehicle) and inactivated hippocampus (muscimol). Indicated are mean (±SEM) values of density and peak-to-peak amplitude of SOs, density, power, and mean duration of spindles during SWS, and theta power and energy during REM sleep; n = 10 rats for each condition (corresponding to the behavioral data in Figs. 1 and 2, one rat was excluded from the analyses due to technical issues with the recording). Note that, apart from a decrease in REM sleep theta power, muscimol infusion did not alter sleep.