Flashcards
Lecture 11 Auditory Pathways
Cards in this deck (34)
- 1What are the starting point/endpoint of 1) outer ear 2) middle ear 3) inner ear1) pinna --> concha --> external auditory meatus --> typanic membrane
2) tympanic membrane --> malleusm incus, stapes
3) cochlea - 2Function of each part of ear.1) amplification of energy
2) amplification of energy and transferring the energy to a smaller area
3) transferring of mechanical energy to electrical energy - 3Oval window is up against the _________. It will cause fluid waves inside the chambers, namely _______, ______, and _____.Scala vestibuli.
scala vestibuli, scala tympani, scala media - 4The fluid in scala vestibuli and scala tympani is called _______.Perylymph
- 5The fluid in scala media is called ________.Endolymph
- 6The ______ in the scala tympani is vibrated.Basilar membrane.
- 7Identify the structures in the organ of Corti. 1) tectorial membrane 2) steorocilia 3) basilar membraneSee slide 3
- 8The ________ in the basilar membrane activates 1st degree axons of the cochlear nerve.inner hair cells.
- 9Where are the cell bodies of the 1st order neurons of the cochlear pathway?spiral ganglion
- 10Where is the synapse between 1st order neuron and 2nd order cell bodies?cochlear nuclei (anteroventral, posteroventral and dorsal)
- 112nd order axons from the dorsal cochlear nucleus ascends the pons and synapses with 3rd order nucleus in the ________, which then terminates in the ________. Locate them on image.Inferior colliculus
then
the medial geniculate nucleus of the thalamus and primary auditory cortex.
see slide 4 - 12The anteroventral nuclei sends signals in (ipsilateral/contralateral/both) sides of the brain.Both
- 13Name and locate the primary auditory cortex ( _______'s gyrus), secondary audiory cortex, and higher-order auditory cortex.Primary: (A1 or BA 41), Heschl's gyrus.
Secondary: A2, or BA42
Higher-order auditory cortex: Wernicke's area, BA 22. - 14Draw the auditory pathwaySee slide 6
- 15The neuron terminating in the primary auditory cortex is the ____ degree neuron.4th
- 16The direct pathway neuron from the ventral cochlear nucleus synapses in the ______.superior olives
- 172nd-degree neuron travels in the (medial/lateral) lemniscus.lateral
- 18The 2nd degree axon decussates in the ________ in the medulla.Trapezoid body.
- 19The 3rd degree axon travels in the ______.Brachium of the inferior colliculus.
- 20The 4th degree axon travels in the _________ part of the internal capsule and then ________ of the corona radiata.sublenticular part
Auditory radiation of the corona radiata - 21Outline both auditory pathways, including the locations of cbs, and tracts each axon travels.See slide 7
- 22Identify the dorsal cochlear nucleus.See slide 8.
- 23Which vascular supply is very important to the blood supply to the DCN?PICA
- 24Identify the trapezoid bodies, superior olives, and lateral lemniscus on the pons cross-sectionSee slide 10
- 25Lateral lemniscus, superior olives, and trapezoid bodies are vulnerable to blood supply loss in the _____ and _____.Basilar artery
AICA - 26Locate lateral lemniscus on the rostral pons.See slide 12.
- 27Primary source of blood supply to the lateral lemniscus?SCA
- 28Locate the lateral lemniscus and brachium of inferior colliculus on the cross-section of caudal midbrain.See slide 14.
- 29Blood supply to the lateral lemniscus and brachium of colliculus in the midbrain is from ________.SCA and PCA
- 30Locate the medial geniculate nucleus in the cross-section of rostral midbrainSee slide 17.
- 31Blood supply for MGN in midbrainPCA
- 32Locate the LGN and MGN on coronal cuts of the brain.See slide 19.
- 33The arcuate fasciculus connects BA41 to _______, identifying the _______ of the sound.posterior parietal cortex, dorsalateral prefrontal and premotor cortex
'where' - 34The uncinate fasciculus connects BA41 to _______, identifying the _____ of the sound.orbital-frontal cortex and ventral premotor cortex
'what'
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- 534 Neuroanatomy Flashcards on Lecture 11 Auditory Pathways, created by Mia Li on 18/10/2017.
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