auditory system Flashcards
what is the innervation for tensor tympani muscle?
V3
what is the innervation for tensor tympani stapedius muscle?
facial
what is interaural distance?
the difference between the side of the noise and the non noise side.
what are the three chambers of the cochlea?
scala vestibuli
cochlear duct
scala tympani
the scala vestibuli and tympani has type of liquid in it?
perilymph
the cochlear duct has what type of liquid in it?
endolymph
the sensory part of the cochlea is in what tube?
cochlear duct
high frequency sounds activate what part of the cochlea?
the basal end, close to the oval window
low frequency sounds activate what part of the cochlea?
the apical end, far from the oval window
the outer spiral bundles do what?
phase match and interpretation
modulate the signal
what do the inner hair cells do?
transmit the signal
what is the membrane that sits over the hair cells?
tectorial membrane
the auditory nerve will go to what 3 cochlear nuclei?
dorsal
posterovental
anteroventral
from the ventral cochlear nucleus where does the synapse occur?
superior olive
what are the two major divisions of the superior olive of the pons?
medial
lateral
the medial superior olive does what?
location/timing
the lateral superior olive does what?
intensity
from the superior olives where is the next synapse?
inferior colliculus
what three things synapse at the inferior colliculus?
dorsal cochlear nucleus
lateral superior olive
medial superior olive
once you are at the inferior colliculus what is formed?
a full spatial map
integration of sound occurs here
what do the nerves travel in to get to the inferior colliculus?
lateral lemniscus
what are the two aspects to the inferior colliculus?
- central which is tonotopically organized
- shell not tonotopic
what is the medial geniculate?
the nucleus in the thalamus where neurons from the inferior colliculus synapse
what is the brachium of the inferior colliculus?
the tracts that the nerves from the inferior colliculus travel in to get to the medial geniculate in the thalamus