lecture 15 - university of california, berkeley · ear physiology lecture 15. ... - peripheral...
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![Page 1: Lecture 15 - University of California, Berkeley · Ear Physiology Lecture 15. ... - Peripheral Auditory System - Hair Cell Auditory Nerves - Auditory Nerve - Adaptation - Synchrony](https://reader033.vdocuments.site/reader033/viewer/2022042309/5ed59d091b7fdd786a1b552a/html5/thumbnails/1.jpg)
EE 2 LECTURE ON EAR PHYSIOLOGY
N.M 15.1
PE Spring,1999
25D
ORGAN / B.GOLD LECTURE 15
University of CaliforniaBerkeley
College of EngineeringDepartment of Electrical Engineering
and Computer Sciences
rofessors : N.Morgan / B.GoldE225D
Ear Physiology
Lecture 15
![Page 2: Lecture 15 - University of California, Berkeley · Ear Physiology Lecture 15. ... - Peripheral Auditory System - Hair Cell Auditory Nerves - Auditory Nerve - Adaptation - Synchrony](https://reader033.vdocuments.site/reader033/viewer/2022042309/5ed59d091b7fdd786a1b552a/html5/thumbnails/2.jpg)
EE 2 LECTURE ON EAR PHYSIOLOGY
N.M 15.2
n
25D
ORGAN / B.GOLD LECTURE 15
Introduction : Anatomy - OK , Physiology - NOT OK.
- Anatomical Pathway
- Peripheral Auditory System
- Hair Cell Auditory Nerves
- Auditory Nerve
- Adaptation
- Synchrony- Non Linearities
- Two Tone Suppresio- Saturation- Masking- Combination Tones
- Block Diagram of Periphey
- Tuning
![Page 3: Lecture 15 - University of California, Berkeley · Ear Physiology Lecture 15. ... - Peripheral Auditory System - Hair Cell Auditory Nerves - Auditory Nerve - Adaptation - Synchrony](https://reader033.vdocuments.site/reader033/viewer/2022042309/5ed59d091b7fdd786a1b552a/html5/thumbnails/3.jpg)
EE 2 LECTURE ON EAR PHYSIOLOGY
N.M 15.3
25D
ORGAN / B.GOLD LECTURE 15
Some Auditory Jargon.
afferent ascending nerve fibers
efferent descending nerve fibers
tonotopic Frequency selectivity vs. place.
{Bank of filters concept}
Malleus Incus Stapes Inner Ear
Innervate connect to
Cochlea Inner Ear
Middle Ear OssiclesOval Window of
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EE 2 LECTURE ON EAR PHYSIOLOGY
N.M 15.4
nkey.
lls
25D
ORGAN / B.GOLD LECTURE 15
Table 14.1 : Cells in the Auditory Nuclei of the Mo
Central Auditory Nucleus Number of Ce
Cochlear Nuclei
Superior-Olivary Complex
Muclei of Lateral Lemniscus
Inferior Colliculus
Medial Geniculate Body Auditory Cortex
88,000
34,000
38,000
32,000
364,000
10,000,000(pars principalis)
- We are somewhat familier with cochlear nucleus.
- There is also work on auditory neurons in Cortex.
![Page 5: Lecture 15 - University of California, Berkeley · Ear Physiology Lecture 15. ... - Peripheral Auditory System - Hair Cell Auditory Nerves - Auditory Nerve - Adaptation - Synchrony](https://reader033.vdocuments.site/reader033/viewer/2022042309/5ed59d091b7fdd786a1b552a/html5/thumbnails/5.jpg)
EE 2 LECTURE ON EAR PHYSIOLOGY
N.M 15.5
uditory Pathways
in with the Ear.
25D
ORGAN / B.GOLD LECTURE 15
Diagram of the A
linking the Bra
![Page 6: Lecture 15 - University of California, Berkeley · Ear Physiology Lecture 15. ... - Peripheral Auditory System - Hair Cell Auditory Nerves - Auditory Nerve - Adaptation - Synchrony](https://reader033.vdocuments.site/reader033/viewer/2022042309/5ed59d091b7fdd786a1b552a/html5/thumbnails/6.jpg)
EE 2 LECTURE ON EAR PHYSIOLOGY
N.M 15.6
r ears are appproximate.
25D
ORGAN / B.GOLD LECTURE 15
Figure 14.3 : The Peripheral Auditory System. Boundaries between outer, middle, and inne
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EE 2 LECTURE ON EAR PHYSIOLOGY
N.M 15.7
25D
ORGAN / B.GOLD LECTURE 15
![Page 8: Lecture 15 - University of California, Berkeley · Ear Physiology Lecture 15. ... - Peripheral Auditory System - Hair Cell Auditory Nerves - Auditory Nerve - Adaptation - Synchrony](https://reader033.vdocuments.site/reader033/viewer/2022042309/5ed59d091b7fdd786a1b552a/html5/thumbnails/8.jpg)
EE 2 LECTURE ON EAR PHYSIOLOGY
N.M 15.8
25D
ORGAN / B.GOLD LECTURE 15
![Page 9: Lecture 15 - University of California, Berkeley · Ear Physiology Lecture 15. ... - Peripheral Auditory System - Hair Cell Auditory Nerves - Auditory Nerve - Adaptation - Synchrony](https://reader033.vdocuments.site/reader033/viewer/2022042309/5ed59d091b7fdd786a1b552a/html5/thumbnails/9.jpg)
EE 2 LECTURE ON EAR PHYSIOLOGY
N.M 15.9
iagram of Peripheral
y System.
25D
ORGAN / B.GOLD LECTURE 15
Block D
Auditor
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EE 2 LECTURE ON EAR PHYSIOLOGY
N.M 15.10
25D
ORGAN / B.GOLD LECTURE 15
![Page 11: Lecture 15 - University of California, Berkeley · Ear Physiology Lecture 15. ... - Peripheral Auditory System - Hair Cell Auditory Nerves - Auditory Nerve - Adaptation - Synchrony](https://reader033.vdocuments.site/reader033/viewer/2022042309/5ed59d091b7fdd786a1b552a/html5/thumbnails/11.jpg)
EE 2 LECTURE ON EAR PHYSIOLOGY
N.M 15.11
Cochlea.
25D
ORGAN / B.GOLD LECTURE 15
Figure 14.7 : Drawing of the cross-section of the
![Page 12: Lecture 15 - University of California, Berkeley · Ear Physiology Lecture 15. ... - Peripheral Auditory System - Hair Cell Auditory Nerves - Auditory Nerve - Adaptation - Synchrony](https://reader033.vdocuments.site/reader033/viewer/2022042309/5ed59d091b7fdd786a1b552a/html5/thumbnails/12.jpg)
EE 2 LECTURE ON EAR PHYSIOLOGY
N.M 15.12
lea.
25D
ORGAN / B.GOLD LECTURE 15
Figure 14.4 : Simplified Model of the Coch
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EE 225D LECTURE ON EAR PHYSIOLOGY
N.MORGAN / B.GOLD LECTURE 15 15.13
Computer Model of Basilar-Membrane Displacement.
![Page 14: Lecture 15 - University of California, Berkeley · Ear Physiology Lecture 15. ... - Peripheral Auditory System - Hair Cell Auditory Nerves - Auditory Nerve - Adaptation - Synchrony](https://reader033.vdocuments.site/reader033/viewer/2022042309/5ed59d091b7fdd786a1b552a/html5/thumbnails/14.jpg)
EE 2 LECTURE ON EAR PHYSIOLOGY
N.M 15.14
ce lls
25D
ORGAN / B.GOLD LECTURE 15
F igure 14.7 : Sketch of the inner and ou ter ha ir
in a cross-section o f the coch lea.
![Page 15: Lecture 15 - University of California, Berkeley · Ear Physiology Lecture 15. ... - Peripheral Auditory System - Hair Cell Auditory Nerves - Auditory Nerve - Adaptation - Synchrony](https://reader033.vdocuments.site/reader033/viewer/2022042309/5ed59d091b7fdd786a1b552a/html5/thumbnails/15.jpg)
EE 2 LECTURE ON EAR PHYSIOLOGY
N.M 15.15
ilia open
ll, causing
lcium
s (Unknown)
channels in
epolarizing fiber.
uses action
vibrates.
ncrease)
ell.
25D
ORGAN / B.GOLD LECTURE 15
HAIR CELL (Pickles)
Ionic channels in stereoc
Potassium ions enter ce
Depolarization opens ca
Influx of calcium release
Neurotransmitter opens
Sodium flows into fiber, d
Depolarization of fiber ca
when basilar membrane
. depolarization (Voltage i
channels near base of c
neurotransmitter.
afferent nerve fiber.
potential (Spike).
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EE 2 LECTURE ON EAR PHYSIOLOGY
N.M 15.16
25D
ORGAN / B.GOLD LECTURE 15
Properties of Auditory Nerves
- Adaptation
- Tuning
- Synchrony
- Non-Linear behavior Saturation
Combination- Masking
![Page 17: Lecture 15 - University of California, Berkeley · Ear Physiology Lecture 15. ... - Peripheral Auditory System - Hair Cell Auditory Nerves - Auditory Nerve - Adaptation - Synchrony](https://reader033.vdocuments.site/reader033/viewer/2022042309/5ed59d091b7fdd786a1b552a/html5/thumbnails/17.jpg)
EE 2 LECTURE ON EAR PHYSIOLOGY
N.M 15.17
25D
ORGAN / B.GOLD LECTURE 15
Figure 14.9 : Adaptation by an auditory nerve.
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EE 2 LECTURE ON EAR PHYSIOLOGY
N.M 15.18
r less randomly spaced
histogram
25D
ORGAN / B.GOLD LECTURE 15
spontaneous
spikes are more o
stimulus
post stimulus time
t2 t3t1
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EE 2 LECTURE ON EAR PHYSIOLOGY
N.M 15.19
ditory Nerve Fibers.
74)
25D
ORGAN / B.GOLD LECTURE 15
Tuning Curves of Six. Au
(King & Moxon 19