Hearing Science
11/27
1. The auditory nerve feeds into the brainstem at the
.: cerebellopontine angle (CPA)
2. There are neurons in the cochlear portion of the VIIIth nerve, and
neurons in the vestibular portion of the VIIIth nerve.
They are all____________________________________________fibers.: 30,000
20,000
Afferent; cochlea to brainstem
3----------------------------------------------------------------------------tumor that arises from the vestibular
part of the eighth nerve.: Acoustic neuroma
4. Coursing through the internal auditory canal are the
: VIIIth nerve (auditory nerve & vestibular nerve), the internal auditory artery, and parts of the VIIth nerve (facial nerve)
5. What are some indicators of tumor?: facial paralysis, balance issues, tinnitus, HL - usually unilateral
6. All of the auditory brainstem nuclei (cochlear nucleus, superi-
or olive, lateral lemniscus, inferior colliculus, medial geniculate) have
- that is, neurons are arranged in an or- derly fashion
based on their .
So, neurons with a low best frequency are anatomically grouped together, and neurons with a high best frequency
are anatomically grouped together.: tono- topicity ; best frequency.
7. Best frequency - lowest level of stimulus that will cause the neuron to fire above .: spontaneous rate
8. The is the first brainstem nucleus to receive
input from both ears.: superior olivary complex (SOC)
9. The superior olive complex mediates
.: acoustic reflex
activity
10.Areas of auditory cortex are found in the temporal lobe in an area called the
.: -
superior temporal gyrus or Heschl's gyrus
11.Tonotopicity is maintained in the................................................................................cortex
1/
5
, Hearing Science
11/27
12.Although some auditory discriminations
can be performed without the (e.g.
intensity discrimination), complex pattern (i.e. the ability to recog- nize intricate patterns of sounds)
and temporal processing (i.e. abil- ity to process and understands the timing of sound) requires the
.: cortex
auditory cortex
13. The auditory nerve extends 17 to 19 mm beyond the internal auditory canal, where it
attaches to the brain stem, at which the cerebellum, medulla oblongata, and pons join to
form the .: cerebellopontine angle
(CPA)
14.Efferent fibers stream from the
via a fiber tract called the
.: auditory cortex (superior olive) to the cochlea.
olivocochlear bundle
15. system may be used to improve our hear- ing in noise.
Used as a gating mechanism.: Efferent
16.Gating mechanism - efferent fiber some attach to the OHC and some of them attach right underneath
the afferent fiber, so they control either
the that is by controlling the OHCs which adds
or what information goes up to the cochlear nucleus by controlling the
afferent fibers.: sensitivity of your cochlea
sensitivity
17.The auditory system shows (as you go up
the auditory system, there are more and more auditory fibers).: intrinsic redundancy
18.The speech signal shows (clues of
grammar, syntax, wide frequency range).: extrinsic redundancy
19.This means that there are multiple neural
pathways carrying similar information about a sound. If one pathway is compromised or noisy, there are still
other pathways available to transmit the information.: intrinsic redundancy
2/
5
11/27
1. The auditory nerve feeds into the brainstem at the
.: cerebellopontine angle (CPA)
2. There are neurons in the cochlear portion of the VIIIth nerve, and
neurons in the vestibular portion of the VIIIth nerve.
They are all____________________________________________fibers.: 30,000
20,000
Afferent; cochlea to brainstem
3----------------------------------------------------------------------------tumor that arises from the vestibular
part of the eighth nerve.: Acoustic neuroma
4. Coursing through the internal auditory canal are the
: VIIIth nerve (auditory nerve & vestibular nerve), the internal auditory artery, and parts of the VIIth nerve (facial nerve)
5. What are some indicators of tumor?: facial paralysis, balance issues, tinnitus, HL - usually unilateral
6. All of the auditory brainstem nuclei (cochlear nucleus, superi-
or olive, lateral lemniscus, inferior colliculus, medial geniculate) have
- that is, neurons are arranged in an or- derly fashion
based on their .
So, neurons with a low best frequency are anatomically grouped together, and neurons with a high best frequency
are anatomically grouped together.: tono- topicity ; best frequency.
7. Best frequency - lowest level of stimulus that will cause the neuron to fire above .: spontaneous rate
8. The is the first brainstem nucleus to receive
input from both ears.: superior olivary complex (SOC)
9. The superior olive complex mediates
.: acoustic reflex
activity
10.Areas of auditory cortex are found in the temporal lobe in an area called the
.: -
superior temporal gyrus or Heschl's gyrus
11.Tonotopicity is maintained in the................................................................................cortex
1/
5
, Hearing Science
11/27
12.Although some auditory discriminations
can be performed without the (e.g.
intensity discrimination), complex pattern (i.e. the ability to recog- nize intricate patterns of sounds)
and temporal processing (i.e. abil- ity to process and understands the timing of sound) requires the
.: cortex
auditory cortex
13. The auditory nerve extends 17 to 19 mm beyond the internal auditory canal, where it
attaches to the brain stem, at which the cerebellum, medulla oblongata, and pons join to
form the .: cerebellopontine angle
(CPA)
14.Efferent fibers stream from the
via a fiber tract called the
.: auditory cortex (superior olive) to the cochlea.
olivocochlear bundle
15. system may be used to improve our hear- ing in noise.
Used as a gating mechanism.: Efferent
16.Gating mechanism - efferent fiber some attach to the OHC and some of them attach right underneath
the afferent fiber, so they control either
the that is by controlling the OHCs which adds
or what information goes up to the cochlear nucleus by controlling the
afferent fibers.: sensitivity of your cochlea
sensitivity
17.The auditory system shows (as you go up
the auditory system, there are more and more auditory fibers).: intrinsic redundancy
18.The speech signal shows (clues of
grammar, syntax, wide frequency range).: extrinsic redundancy
19.This means that there are multiple neural
pathways carrying similar information about a sound. If one pathway is compromised or noisy, there are still
other pathways available to transmit the information.: intrinsic redundancy
2/
5
