Special Senses Ear Flashcards
the ear is what part of the temporal bone
the petrosal part
tensor tympani is suppleid by what
V3
stapedius is supplied by
CN VII
what are the thigns that the typanic membrane coems from
ectoderm, mesoderm, and endoderm
autitis externa how can you tell
pull on ear and baby will scream
what 3 things are in the middle ear
- ossicles
- muscles ( 2)
- oval window and round window
the oval window is near what? the round window is near what
stapes
cohclea
what are the two labirinths in the internal ear
bony and membranous
what is the series of spaces inside the petrous part of the temporal bone
bony labyrinth
extracellular fluid
perilymph
intracellular fluid?
endolymph
wat 3 things make up the bony lab
vetibule
semicrcular canal
cochlea
how many times does the cochlea wind around the modiolous
2 and 1/2 turms
the scala vestibuli and tympani are part of the
bony lab
what does sprial organ sit on
basilar membrane
what seperates the media and vestibuli
reissner (vestibula membrane)
what extends laterally from the modiolus and is a thin bony ridge
osseus spiral lamina
what is the opening that the vestibuli and the tympani communicate through
helicotrema
what is the apex of the cochlea
helicotrema
what secrets endolymph
stria vascularis
where are stereocilia
on the hair cells
what are the cells that occupy the space between the inner and outer hair cells
pillar cells
bipolar cells are where
spiral ganglion
oval window sets up sound waves in what
cochlea
the basilar membrane is more what then the tectorial membrane
elastic
what is the moving in one direction
linear acceleration
what is it when you are moving in an angle like flying
angular acceleration
semicircular canal helps in what movement
angular accelaration
what respond to linear acceleration
saccule/utricle
what are the three parts of the saccule/utricle
macula
neuroepithelial (hair) cells
otoliths
what are the three parts of the semicircular ducts
cristae ampullares
neuroepithelial hair cells
cupula
