Ear Flashcards
another name for auditory tube?
pharyngotympanic tube
three parts of the external ear? features within the first one?
auricle/pinna: helix, antihelix, tragus, antitragus, concha, lobule, scaphoid fossa
external acoustic meatus
tympanic membrane
SA info to outer ear by? what about concha and EAM
auriculotemporal n (V3) + greater auricular n (C2-3) + lessor occipital n (C2-3)
CNVII + auricular branch of CNX + small component CNIX
blood supply to auricle + EAM?
posterior auricular art + superficial temporal art
lymph drainage of auricle + EAM?
superficial parotid LN + mastoid LN + deep cervical LN + superficial cervical LN
innervation of ext vs. int tympanic membrane (SA)
autriculotemporal n + auricular branch of CNX (some CNIX) vs. CNIX
order of membranes + auditory ossicles from ext -> int
tympanic membrane -> malleus -> incus -> stapes -> oval window
6 walls of the middle ear cavity, where do you find chorda tympani? tympanic plexus?
anterior: cartoid
posterior: mastoid
lateral: membranous (chorda tympani CNVII)
medial: labyrinthine (tympanic plexus CNIX on promontory)
roof: tegmental
floor: jugular
which muscle attaches to handle of malleus? innervated by? head of malleus extends to ___?
tensor tympani, V3, epitympanic recess
where do you find lesser petrosal in relation to promontory
superiorly
posterior wall of middle ear has an opening called __ that leads into a chamber called __ lined by ___. This wall also contains the __ ,which accommodates __, and terminates as the __
aditus mastoid antrum mastoid air cells facial canal facial n stylomastoid foramen
stapedius innervated by?
CNVII
which cavities are associated w bony labyrinth? what lines it? what does the spiral canal of cochlea turn around? how does bony labyrinth communicate w subarachonid space?
cochlea, vestibule, semicircular canals
otic capsule
modiolus
cochlear aqueduct
vestibule contains the __ & __, and is continuous with the cranial fossa by the __, which transmits the ___ duct. each semicircular canal has a __ at one end, only has 5 instead of 6 openings because __ and __ share a common limb
utricle, saccule vestibular aqueduct endolymphatic bony ampulla ant + post
membranous labyrinth contains __ which differs from ___, which 3 structures associated with it?
endolymph (similar to ICF), perilymph (similar to ECF)
vestibular labyrinth, cochlear labyrinth, semicircular ducts