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Central Pathway
Audiology Exam 1
| Question | Answer |
|---|---|
| Peripheral Auditory System includes? | All structures in the external, middle, and inner ear |
| Central Auditory System includes? | All structures from the auditory nerve up to the cortex |
| Nuclei | Dense collection of neuron cell bodies that forms a neural structure |
| Nerve | Dense collection of neuron axons that allows for communication between neural structures |
| The auditory vestibular nerve is interchangeable with what nerve? | 8th cranial nerve |
| The auditory vestibular nerve synapses onto inner hair cells in the _________ (95%) or ___________ sensory cells | Cochlea, vestibular |
| The auditory vestibular nerve carries both ________ and _________ information | Auditory and vestibular |
| For the auditory vestibular nerve, the auditory portion is commonly referred to as the ____________ because of it’s shape and look | Spiral ganglion neuron |
| Spiral ganglion neurons are organized | Tonotopically |
| The spiral ganglion neuron 's low frequencies are on the ___________ | Inside |
| The spiral ganglion neuron's high frequencies are on the ____________ | Outside |
| What are the 7 parts of the Central Auditory pathway? | Auditory Nerve (Spiral Ganglion Neuron), Cochlear Nucleus (CN), Superior Olivary Complex (SOC), Lateral Lemniscus, Inferior Colliculus (IC), Medial Geniculate Body (MGB), Auditory Cortex (AC) |
| What does the auditory nerve (8th CN) do? | Carries neural signal into the Auditory Brainstem |
| Cochlear nucleus | First Central Auditory Nuclei, Important for stimulating Facial Nucleus which activates the Stapedius muscle |
| Superior Oliver Complex (SOC) | First location where sound localization processing takes place |
| Lateral Lemniscus | Not a nucleus, thick branch of axons which carry information to the Inferior Colliculus |
| Inferior colliculus | Large brainstem auditory nuclei that receives inputs from main lower structures |
| The inferior colliculus functions as a "switch board" and is involved with what three complex processing? | Localization, startle reflex, and vestibular-ocular reflex |
| The thalamus auditory nuclei is also known as? | Medial geniculate body |
| Medial Geniculate Body (MGB) | Portion of the Thalamus acts as a relay station to the cortex (Thalamocortical radiations) |
| The Auditory Cortex | Where neural signal is interpreted as the perception of sound |
| The auditory cortex is located in the ____________ of the cortex | Temporal lobe |
| The auditory cortex is located along the Along the _______________ | Lateral fissure |
| Left Auditory cortex is primarily responsible for? | Processing speech information |
| The left auditory cortex has neural communication between __________ and ____________ | Broca's area, Wernicke's area |
| Broca's area is in which lobe? | Frontal |
| Wernicke's area is in which lobe? | Temporal |
| Arcuate Fasciculus | neural track connecting Broca’s and Wernicke’s areas |
| Right auditory cortex must travel back to the left hemisphere for effective _____________ ____________ | Language comprehension |
| Corpus callosum | Thick neural track that connects right and left hemispheres |
| Most people have a _____________________ | Right ear advantage |
| Why do most people have a right ear advantage? | Most auditory information coming from right ear goes directly to left auditory cortex |
Created by:
RachelJClark
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