Table 3.

Relative delta, theta, and sigma power in SWS, theta power in PS, and theta power and frequency in exploratory behavior

Mouse Strain SWSPS Exploratory Behavior
DeltaTheta Sigma Theta Theta Frequency
AK26 ± 1* 26 ± 1 13 ± 0 63 ± 1* 57 ± 1* 8.2 ± 0.1
C 26 ± 2* 25 ± 1 13 ± 1 52 ± 2 36 ± 2 7.9 ± 0.2
B6 23 ± 1* 27 ± 1 13 ± 1 54 ± 2 54 ± 2* 8.7 ± 0.1*
BR 19 ± 1 26 ± 1 16 ± 1* 55 ± 2 52 ± 4* 8.9 ± 0.1*
D214 ± 1§ 28 ± 1 18 ± 1* 50 ± 2 32 ± 2 7.9 ± 0.1
129 19 ± 2 27 ± 115 ± 1 54 ± 2 50 ± 2* 8.5 ± 0.2*
  • Values are mean power in 3 frequency bands ± SE (n = 7) as a percentage of total electroencephalogram (EEG) power (=100%) in SWS, PS, and exploratory behavior, respectively, except for mean frequency during exploratory behavior, which is in Hz (n = 7). In SWS, delta (1.5–4.0 Hz) and sigma (11.0–15.0 Hz) power varied among strains (1-way ANOVA, P < 0.01), whereas theta (5.5–8.5 Hz) power did not. Theta power in PS (6.0–9.0 Hz) and during exploratory behavior (7.0–10.0 Hz) did vary among strains (1-way ANOVA; PS: P < 0.01; exploratory behavior:P < 0.001). Mean theta frequency during exploratory behavior varied among strains (1-way ANOVA,P < 0.0001). Mean strain values that significantly differed from other strains are indicated with a different symbol (t-test; EEG power: SWS, PS: P < 0.05; exploratory behavior: P < 0.001; EEG frequency in exploratory behavior: P < 0.005).