Otic pit

Otic pit
Section through the head of a human embryo, at the beginning of the fourth week, in the region of the hind-brain.
Details
Precursor	auditory plate
Identifiers
Latin	fovea otica
Code	TE E5.15.2.0.0.0.5
Anatomical terminology []

The auditory pit, also known as the otic pit, is the first rudiment of the internal ear. It appears shortly after that of the eye, in the form of a patch of thickened ectoderm, the auditory plate, over the region of the hind-brain. The auditory plate becomes depressed and converted into the auditory pit (or otic pit).

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