Card Set Information
External auditory meatus lined by
ceruminous glands: secrete wax
Roof of tympanic cavity
Plate of bone - separates from middle cranial fossa, meninges, temporal lobe of brain
Floor of tympanic cavity
Thin plate of bone - separates from jugular fossa and carotid canal
Lateral wall of tympanic cavity
Tympanic membrane - placed obliquely downwards and medially
Bones in middle ear
Base of stapes attached to
Oval window/fenestra vestibuli
Muscle attached to malleus, and nerve supply
Muscle attached to stapes, and nerve supply
Auditory tube leads to? and another name
Role of auditory tube
Allows air to enter or escape to equalise pressure
Tympanic cavity communicates with ? posteriorly?
To mastoid antrum, via the aditus
Mastoid antrum related to?
: temporal lobe
Also separated by a thin plate of bone from posterior cranial fossa with cerebellum and sigmoid sinus
Blood supply to middle ear
Internal carotid artery
Middle ear innervated by? which plexus?
Nerve running through middle ear?
Facial nerve, in bony canal
Internal ear consists of? containing?
Osseous labyrinth, containing membranous labyrinth
In vestibule? responsible for?
Responsible for static equilibrium
In semicircular canals? responsible for?
Responsible for dynamic equilibrium
What is the organ of hearing?
The cochlea duct
Nerve supply to internal ear structures?