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.
Mean responses per minute as a function of time into SS (smaller-sooner; top row) and LL (larger-later; bottom row) peak trials for all SS delays when rats were in proestrus (P), estrus (E), and met/diestrus (MD). Markers represent mean responses and lines represent fitted repeated measures multi-level nonlinear regression values. The solid vertical lines represent the target interval.
