Frontonasal prominence

Frontonasal prominence
Under surface of the head of a human embryo about twenty-nine days old. (Frontonasal process labeled at center left.)
Details
Identifiers
Latin	prominentia frontonasalis
Code	TE E5.3.0.0.0.0.6
Anatomical terminology []

During the third week of embryonic development, two areas of thickened ectoderm, the olfactory areas, appear immediately under the fore-brain in the anterior wall of the stomodeum, one on either side of a region termed the frontonasal prominence (or process).

By the upgrowth of the surrounding parts these areas are converted into pits, the olfactory pits, which indent the frontonasal prominence and divide it into a medial and two lateral .

There is some evidence that development involves Sonic hedgehog and Fibroblast growth factor 8.

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)