Floor Of Middle Ear Cavity

Its preganglionic parasympathetic fibres supply the secretomotorfibres to the parotid gland.

Floor of middle ear cavity.

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. The space is called the tympanic cavity and it has two parts. The ceiling superior wall is a thin plate of bone that separates the middle ear cavity from the cranial cavity and brain above. 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 tympanic cavity proper directly behind the membrane and the epitympanic recess which is located just above the membrane. It gives sensory supply to the liner of middle ear antrum and auditory tube. 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.

It enters the middle ear via a canaliculus in the floor of the tympanic cavity and takes part in the formation of tympanic plexus. Tympanums tympana is an air filled chamber in the petrous part of the temporal bone. Tympanic branch of glossopharyngeal nerve. The middle ear or middle ear cavity also known as tympanic cavity or tympanum plural.

The tympanic cavity is bounded by.