Tympanic Sulcus

The tympanic groove - (sulcus tympanicus) is a depression in the middle and lower part of the anterior surface of the posterior bone, forming a passage inside the auditory (Eustachian) tube. Connects the tympanic cavity and the oropharynx, connects the external auditory canal with the vestibule of the middle ear. The section of the tympanic groove that opens into the mouth and is located closer to the lateral wall of the pharynx is called the vomerotympanic groove. It is important for breathing and pronunciation of speech sounds, and is one of the smallest in the human body.