Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Spearman rank correlations between spectral power and cognitive variables. Upper left panel: mean power density spectrum (all nights) of N2 sleep. Upper right panel: mean power density spectrum (all nights) of N3 sleep. Lower panels: Significant correlations for different cognitive variables.
