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.
Conditional freezing during training. Mean (±SEM) percentage of freezing in the 3 min prior to receiving tone–footshock pairings (PRE) and mean (±SEM) percentage of freezing for the postshock period in which freezing was maximal (POST). Asterisk indicates that P < 0.05, in planned comparisons between the UNI and SHAM groups and groups with discrete neurotoxic lesions of amygdaloid nuclei.
