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.
and 
.
The six possible cases are depicted with respect to the location of the potentiation, 
(orange dashed line), and the depression thresholds, 
(cyan dashed line).
