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.
Representative signal changes in the three periods. The oxy-Hb and deoxy-Hb signal changes in five channels in each hemisphere were plotted. The red and blue lines indicate oxy- and deoxy-Hb signals, respectively. The vertical lines in period 2 indicate the onset and offset of the stimulus presentation.
