Ear Flashcards
what is the ear drum known as and what is it a border b/w?
tympanic membrane. border b/w outer and middle ear
what can cause the cone of light to move and why?
middle ear infection - pressure build up
which quadrant would one see the cone of light
(anterior Inferior)
which direction does the auditory tube project and to where?
anterior-inferiorly into nasopharynx
what is the significance in the clinical significance in a child’s auditory tube
angle more horizontal so cant drain as well. kids more prone to infection
another name for auditory tube?
eustachian tube
name the middle ear bones as a group and individually. order them
ossicles.
Malleus, Incus & stapes
name the 2 windows of the middle ear from superior to inferior. which does stapes cover
oval window (covered by stapes). round window
name the 2 muscles in the ear, their innervation and function
Tensor Tympani (T for Trigeminal) & Stapedius (S for CN 7) Dampen amplitude of sound. Stapedius stabilises stapes
what is chorda tympani and where can it be seen?
branch of facial nerve that provides taste to anterior 2/3s of tongue. Seen in medial wall of middle ear
which bone and what part specifically houses the inner ear
petrous part of temporal bone
what is the purpose of the round window
place for mechanical energy to escape if built up
what is bony labyrinth and what is it filled with
sapce in the petrous paart of temporal bone with the perilymph
what is the membranous labyrinth
a closed sac filled with endolymph
where are the sensory and balance receptors of the ear
membranous labyrinth
