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.
Illustration of the Limiting Boundaries for the Frontal Lobe Regions
Notes. Panel A. Cingulate sulcus (white), callosal sulcus (red) and tip of the cingulate sulcus (green); Panel B. Superior frontal sulcus (SFS; red), precentral sulcus (PRC; white) and connection of the SFS and PRC (green); Panel C. anterior horizontal ramus (ahr; red) and anterior tip of the ahr (green); Panel D. Olfactory sulcus (OLS, red) and posterior tip of the OLS (green)
