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20 Cards in this Set
- Front
- Back
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in what part of the ear are the ossicles found and what are they called?
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They are in the middle ear and are the malleus, incus, and stapes
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Which nucleus do the hair cells of the inner ear send impulses to and where is it located?
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Spiral ganglion and its located in a depression in the temporal bone.
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Where do fibers from the spiral ganglion synapse in the brainstem?
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cochlear nuclei in the medulla
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Where do the majority of fibers from the ventral and dorsal cochlear nuclei synapse.
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They travel bilaterally to the inferior colliculus via the lateral lemniscus.
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Where do fibers from the inferior colliculi travel and synapse?
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Medial geniculate body in the thalamus
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What is the end destination of auditory fibers?
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Primary auditory cortices of the temporal lobe
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Aside from the inferior colliculus, where else do fibers from ventral cochlear nuclei synapse?
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They travel bilaterally to the superior olivary nucleus, then through the lateral lemniscus to the inferior colliculus.
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Where do fibers of the startle reflex travel?
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From the inferior colliculus to autonomic motor centers
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What is the name of the pathway from the thalamus to the temporal gyrus?
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Auditory radiation
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What are the vestibular receptor organs called and where are they located?
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Fluid filled sacs called utricle and sacculus and three fluid-filled semicircular canals found in the inner ear.
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What ganglion is associated with vestibular sensory fibers?
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Vestibular ganglion in the internal acoustic meatus.
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Where do fibers from vestibular ganglia synapse?
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In the lateral and superior vestibular nuclei
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Where do vestibular fibers from the vestibular nuclei travel?
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To the flocculonodular lobe of the cerebellum via the inferior cerebellar peduncle.
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Where do vestibular fibers from the flocculonodular lobe travel?
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To the fastigial nucleus of the cerebellum.
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Fibers that bypass the vestibular nuclei from the ganglia terminate where?
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Flocculonodular lobe of cerebellum
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Where do vestibular nuclei from the fastigial nucleus travel?
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They travel bilaterally to synapse on the vestibular nuclei to establish the feedback loop.
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Fibers cascading down to the lateral vestibular nucleus send motor impulses to the spinal cord in what tract?
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Vestibulospinal tract and they synapse on anterior horn cells.
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Fibers cascading down to the superior, meidal, and inferior vestibular nuclei send motor impulses to the spinal cord in what tract?
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Ipsilaterally and contralaterally in the medial vestibulospinal tract.
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Vestibulo-occular fibers travel where?
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From the medial, superior, and inferior vestibular nuclei bilaterally in the medial longitudinal fasciculus to the occulomotor, trochlear, and abducens nuclei.
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Vestibulo-thalmo-cortical pathways run where?
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They originate in the superior, lasteral, and inferior vestibular nuclei and synapse in the ventral posterolateral nucleus and posterior nuclear group of the thalamus.
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