Floor Of Middle Ear Cavity

Tympanic branch of glossopharyngeal nerve.

Floor of middle ear cavity.

The space is called the tympanic cavity and it has two parts. Tympanums tympana is an air filled chamber in the petrous part of the temporal bone. The tympanic cavity is bounded by. It is separated from the external ear by the tympanic membrane and from the inner ear by the medial wall of the tympanic cavity.

The auditory tube also known as the eustachian tube or the pharyngotympanic tube joins the tympanic cavity with the nasal cavity nasopharynx allowing pressure to equalize between the middle ear and throat. The middle ear or middle ear cavity also known as tympanic cavity or tympanum plural. The ceiling superior wall is a thin plate of bone that separates the middle ear cavity from the cranial cavity and brain above. The hollow space of the middle ear is also known as the tympanic cavity and is surrounded by the tympanic part of the temporal bone.

The floor inferior wall is also a thin bony plate in this case separating the middle ear cavity from the jugular vein and the carotid artery below. Facing the inner ear the medial wall or labyrinthic wall labyrinthine wall is vertical and has the oval window and round window the promontory and the prominence of the facial canal. It enters the middle ear via a canaliculus in the floor of the tympanic cavity and takes part in the formation of tympanic plexus. On its lateral surface it abuts the external auditory meatus ear canal from which it is separated by the tympanic membrane eardrum.

The tympanic cavity proper directly behind the membrane and the epitympanic recess which is located just above the membrane.