Table 2.

Statistics of post-hoc two-tailed t test of sleep session (pretraining vs post-training) and Pearson product-moment correlation analysis (coefficient and p values) conducted for each frequency band during slow-wave sleepa

ROIContralateral Frequency bandFirst criterion (t test): pSecond criterion (correlation)ROIIpsilateral Frequency bandFirst criterion (t test): pSecond criterion (correlation)
rprp
M1δ0.039*0.1600.681M1δ0.031*0.4370.239
θ0.048*0.1510.698θ0.454
α0.174α0.602
Slow σ0.146Slow σ0.308
Fast σ0.084Fast σ0.175
SMAδ0.009*0.870**0.002**SMAδ0.008*0.5360.137
θ0.006*0.6300.069θ0.058
α0.085α0.055
Slow σ0.407Slow σ0.402
Fast σ0.032*0.797**0.010**Fast σ0.181
Pre-SMAδ0.005*0.6330.067pre-SMAδ0.003*0.4370.239
θ0.124θ0.019*0.3370.375
α0.169α0.071
Slow σ0.28Slow σ0.775
Fast σ0.437Fast σ0.341
PMδ0.043*0.3310.385PMδ
θ0.094θ
α0.127α
Slow σ0.349Slow σ
Fast σ0.064Fast σ
  • aThe former analysis corresponds to the first criterion (the activation in a ROI should be significantly different between the post-training vs pretraining sleep sessions), and the latter analysis corresponds to the second criterion (the modified activation in the ROI should be significantly correlated with performance improvement after post-training sleep).

  • *Statistically significant values for the first criterion (p < 0.05).

  • **Statistically significant values for the second criterion (p < 0.05).