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.
Peak frequency of Granger causality. Three significant components (early forward, middle backward, and late forward) were derived from the time course of gamma Granger causality. Each histogram represents the population average (n = 21) of the peak frequency for each component of Granger causality. Error bars represent SEM. The asterisk indicates statistical significance assessed by the paired t test, corrected for multiple comparisons.
