anatomy of hearing-3

_____ are the location of hair cells in semicircular canals

cupula

_______ are the location of hair cells in the vestibule or cochlea

otolithic membrane

cochlear duct

_____ is the sense of the room spinning

vertigo

_____ is the rapid, rocking movement of the eyes

nystagmus

you will always have __________ when you have vertigo

nystagmus

the cochlear duct is made of _____ membranes (#)

2

membranes that make up the cochlear duct

vestibular (Reissner) membrane

basilar membrane

the ___________ lines up with the spiral lamina

basilar membrane

descriptions of apex of cochlea

wide and flaccid

frequencies at the apex of the cochlea are _____

low

descriptions of base of cochlea

narrow and tense

frequencies at the base of the cochlea are ______

high

________ is in the bony cochlea

perilymph

__________ is in the cochlear duct

endolymph

the ____________ is tonotopic

basilar membrane

different frequencies in different parts of cochlea

scala media v cochlear duct

space v structure

unrolled cochlea

organ of corti

center part of the cochlea, containing hair cells, canals, and membranes

aka spiral organ

the _______ is the sensory organ for hearing

organ of corti

supporting cells in spiral organ of corti

phalangeal cells (inner phalangeal cells)

rods of corti (pillar cells)

cells of Deiters(outer phalangeal cells)

supporting cells of Hensen

the receptor (sensory) cells in spiral organ of corti

inner hair cells

outer hair cells

the __________ hold inner hair cells

phalangeal cells (inner phalangeal cells)

the _________ form the inner tunnel of corti and separate the inner and outer phalangeal cells

rods of Corti (pillar cells)

the __________ hold the outer hair cells

cells of Deiters (outer phalangeal cells)

the _________ form the outer tunnel of corti

supporting cells of Hensen

the ___________ are where the action happens; where mechanical energy changes to electrochemical

receptor (sensory) cells

organ of corti is located in ______

cochlear duct

organ of corti diagram

4 differences between outer and inner hair cells

1. shape

2. arrangement of stereocilia (hairs)

3. nerve supplies

4. connection to the tectorial membrane

the ________ is a gelatinous mass hair cells stick into

tectorial membrane

shape of inner and outer hair cells

inner: teardrop/gourd shape

outer: test tube shape

arrangement of stereocilia inner v outer hair cells

inner: in a u-shaped pattern

outer: in a v- or w-shaped pattern

nerve supplies inner v outer hair cells

inner: as many as 10 fibers to 1 hair cell

outer: as many as 10 outer hair cells for 1 nerve fiber

connection to tectorial membrane inner v outer hair cell

inner: tenuous or brushing against it, slight connection

outer: firmly embedded in tectorial membrane