Figure 3. Graphical presentation of the CPP paradigm used.
All conditioning sessions and preference tests were performed at the same time daily. Animals were allowed to habituate in the CPP apparatus for 45 min before the conditioning phase.
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.