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.
Data given in 30-min time bins. Grey section of the graph represents the dark phase of the light-dark cycle. (A) Activity over 24h. (B) Time spent in immobility defined sleep over 24h. (C) Average length of sleep bouts over 24h.
