Floor Of Middle Ear Cavity

The tympanic cavity is bounded by.

Floor of middle ear cavity.

It is separated from the external ear by the tympanic membrane and from the inner ear by the medial wall of the tympanic cavity. Tympanums tympana is an air filled chamber in the petrous part of the temporal bone. On its lateral surface it abuts the external auditory meatus ear canal from which it is separated by the tympanic membrane eardrum. Its preganglionic parasympathetic fibres supply the secretomotorfibres to the parotid gland.

The middle ear or middle ear cavity also known as tympanic cavity or tympanum plural. 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. It gives sensory supply to the liner of middle ear antrum and auditory tube. The space is called the tympanic cavity and it has two parts.

The middle ear takes up the space behind the tympanic membrane inside 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. 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.

It enters the middle ear via a canaliculus in the floor of the tympanic cavity and takes part in the formation of tympanic plexus.