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.
Coefficients of variation plotted against interspike intervals for all VRC neurons (n = 22). Circles with the line of best fit are taken from control measurements before fentanyl administration. Diamonds with the best-fit line are from fentanyl measurements made after injecting threshold doses of fentanyl.
