Table 1.

Time spent in each behavioral state

Mouse Strain W SWS PS
AK52.0 ± 0.9* 42.8 ± 0.7 5.0 ± 0.2*
C 56.1 ± 1.0* 38.7 ± 0.9 5.2 ± 0.2*
B659.4 ± 1.8 35.6 ± 1.5* 4.8 ± 0.3*
BR 60.1 ± 0.9 33.8 ± 1.3* 6.0 ± 0.6
D263.6 ± 1.7 31.3 ± 1.8* 4.8 ± 0.1*
129 59.3 ± 3.1 34.6 ± 3.1* 6.1 ± 0.3
  • Values are mean percentages ± SE (n = 7) of artifact-free recording time for amount of wakefulness (W), slow-wave sleep (SWS), and paradoxical sleep (PS). Time spent in each behavioral states varied among strains (1-way ANOVA: W,P < 0.005; SWS, P < 0.001; PS,P < 0.05). AK, AKR/J; C, BALB/cByJ; B6, C57BL/6J; BR, C57BR/6J; D2, DBA/2J; 129, 129/Ola mice. Mean strain values that significantly differed from other strains are indicated with a different symbol (t-test; P < 0.05).