1000ft view of hearing/balance Flashcards
what is the ear canal lined with
keratinized squamous epithelium
What makes up the middle ear
tympanic membrane
malleus
incus
stapes
what makes up the inner ear
semicircular canals
oval window
cochlea
nerves (CN VII, VIII)
what part of the ear is for hearing
cochlea
what converts sound waves into nerve impulses
contains the organs of Corti
what is included in the Vestibule
semicircular canals, utricle and saccule
how do we hear
sound collected from outside world
strokes tympanic membrane, causes vibration of malleus - incus - stapes
this will tap the oval window of the cochlea
the movement is transmitted via endolymph
what are the three different parts within the cochlea
scala vestibuli (perilymph)
scala typmani (perilymph)
Scala media (cochlear duct) (endolymph)
what determines the location of stimuli
frequency of sound wave or pitch
what is moved with the fluid wave from the cochlea within the endolymph
tectoral membrane which causes hair cells to move against the membrane
what determines how loud something is
the number of hair cells stimulated
what determines dynamic movement
semicircular ducts
what is the utricle responsible for
linear acceleration
what is the saccule responsible for
vertical accelleration
where are the otoliths located
covering the hair cells (little crystals)
