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.
Changes in cortical thickness, cortical thickness ratio, and sulcal depth with respect to aging for humans and chimpanzees. Top: Atrophy of the cortex with aging for both species. Middle: Cortical thickness ratio does not change considerably with age. Bottom: Cortical atrophy causes sulcal shallowing for both species.
