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 cortical silent period (CSP) duration measures from abstinent cocaine-dependent and healthy individuals expressed in milliseconds. Longer CSP duration values represent increased inhibition. Intensities of stimulation are shown in percentages of AMT (active motor threshold). Error bars represent standard deviations.
