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.
(A) Scientific drawing, (B) interpretative drawing and (C) photograph of the frontal and left prefrontal in dorsal view. The angle formed by the lateral contacts of the frontal with the prefrontal and nasal is indicated in (B). Abbreviation: fr, frontal; if, intertemporal flange; prf, prefrontal. Matrix is in yellow.
