Ear Flashcards
what is the eardrum membrane called ?
it is called the tympanic membrane
what does the external ear consist of ?
- ) the auricle (pinna)
- )external auditory canal
- ) tympanic membrane
what are the three auditory ossicles in the ear called?
malleus
incus
stapes
what does the eustachian tube do?
connects middle ear to pharynx and is the auditory tube
what seperates the middle ear from the inner ear ?
oval window
what are the muscles present in the middle ear ?
tensor tympani
stapedius
what is the central portion of the inner ear ?
vestibule
what is the cochlea ?
snail shaped bony structure , contains auditory fluids that aid in transmission of sound vibrations
what does the inner ear contain ?
organ of corti : true organ of hearing contained within the cochlea . here , sound vibrations are converted into nerve impulses that are transmitted to the brain for interpretation as hearing
semicircular cannals : located behind vestibules
-three bony , fluid filled loops that help maintain ones balance
what is responsible for the blood supply of the external ear ?
posterior auricular and branches of superficial temporal artery
what is the nerve supply of the external ear ?
greater auricular , lesser occipital , auricular branch of vagus nerve , auriculotemporal nerve
what is respoinsible for the blood supply of the middle ear ?
posterior auricular artery and deep auricular branch of maxillary artery
what is responsible for the nerve supply of the middle ear ?
tympanic branch of glossopharyngeal nerve
