Ear Physiology Flashcards
The membranous labyrinth contains what kind of lymph?
Endolymph
Where does the organ of conti lie?
The cochlear duct
Where is higher frequency hearing generated?
The basal turn of the cochlear
What kind of epithelium is present in the external auditory canal and the pinna?
Stratified keratinised epithelium
What lies within the outer layer of the tempanic membrane?
Skin
What kind of layer is the middle layer of the tempanic membrane?
Fibrous layer
What is the inner layer of the tempanic membrane made up of?
Ciliated columnar epithelium with goblet cells
What is the function of an ossicle?
Conduct sound waves from tempanic membrane to the inner ear
What is the function of the Eustachian tube?
To equalise pressure within the middle ear so middle ear pressure is equal to atmospheric pressure. This allows for optimal tempanic membrane function
How does the middle ear connect to the mastoid system?
Via the Aditus
How does the middle ear connect to the nasopharynx?
The Eustachian tube
What nerve transmits hearing vibrations to the brain?
The Vestibulocochlear Nerve(CNVIII)
What section of the ear transducts vibrations into nervous impulses in regards to hearing?
The middle ear
What structure vibrates in the oval window to cause a pressure wave of fluid in the cochlear section of the ear?
The stapes/stirrup
What nerve provides sensation to middle ear?
Tympanic branch of glossopharyngeal nerve
