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.
Group differences in the mean phase difference (MPD) during slow spindles for the first 3 sleep cycles (Fz–C5 channel pair; combined set). Error bars indicate standard errors of the mean. Asterisks indicate the level of statistical significance for the group differences: ***p < 0.001.
