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.
The visceral pain threshold of mice in each group. (A) Schematic of PTT. (B) The visceral pain threshold of each group. All data were expressed as mean ± SD. *, P<0.05, **, P<0.01 vs. Control group; #, P<0.05 vs. NMS group. NMS, neonatal maternal separation; EE, enriched environment; EE1 group, prepubertal EE group; EE2 group, pubertal EE group; EE3 group, adult EE group; PTT, pain threshold test; SD, standard deviation.
