bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2023,
Volume and Issue:
unknown
Published: Dec. 23, 2023
Sound
is
jointly
processed
along
acoustic
and
emotional
dimensions.
These
dimensions
can
become
distorted
entangled
in
persons
with
sensory
disorders,
producing
a
spectrum
of
loudness
hypersensitivity,
phantom
percepts,
-
some
cases
debilitating
sound
aversion.
Here,
we
looked
for
objective
signatures
disordered
hearing
(DH)
the
human
face.
Pupil
dilations
micro
facial
movement
amplitudes
scaled
valence
neurotypical
listeners
but
not
DH
participants
chronic
tinnitus
(phantom
ringing)
sensitivity.
In
participants,
emotionally
evocative
sounds
elicited
abnormally
large
pupil
blunted
invariant
reactions
that
provided
an
accurate
prediction
individual
hyperacusis
questionnaire
handicap
scores.
By
contrast,
EEG
measures
central
auditory
gain
identified
steeper
neural
response
growth
functions
no
association
symptom
severity.
findings
highlight
dysregulated
affective
processing
bothersome
sensitivity
disorders
introduce
approaches
their
measurement.
Brain,
Journal Year:
2023,
Volume and Issue:
146(12), P. 4809 - 4825
Published: July 27, 2023
Mechanistic
insight
is
achieved
only
when
experiments
are
employed
to
test
formal
or
computational
models.
Furthermore,
in
analogy
lesion
studies,
phantom
perception
may
serve
as
a
vehicle
understand
the
fundamental
processing
principles
underlying
healthy
auditory
perception.
With
special
focus
on
tinnitus-as
prime
example
of
perception-we
review
recent
work
at
intersection
artificial
intelligence,
psychology
and
neuroscience.
In
particular,
we
discuss
why
everyone
with
tinnitus
suffers
from
(at
least
hidden)
hearing
loss,
but
not
loss
tinnitus.
We
argue
that
intrinsic
neural
noise
generated
amplified
along
pathway
compensatory
mechanism
restore
normal
based
adaptive
stochastic
resonance.
The
increase
can
then
be
misinterpreted
input
perceived
This
formalized
Bayesian
brain
framework,
where
percept
(posterior)
assimilates
prior
prediction
(brain's
expectations)
likelihood
(bottom-up
signal).
A
higher
mean
lower
variance
(i.e.
enhanced
precision)
shifts
posterior,
evincing
misinterpretation
sensory
evidence,
which
further
confounded
by
plastic
changes
underwrite
predictions.
Hence,
two
provide
most
explanatory
power
for
emergence
perceptions:
predictive
coding
top-down
resonance
complementary
bottom-up
mechanism.
conclude
both
also
play
crucial
role
Finally,
context
neuroscience-inspired
improve
contemporary
machine
learning
techniques.
Journal of Neurophysiology,
Journal Year:
2021,
Volume and Issue:
126(6), P. 2027 - 2038
Published: Nov. 17, 2021
Noise-induced
damage
to
synapses
between
inner
hair
cells
and
auditory-nerve
fibers
(ANFs)
can
occur
without
permanent
cell
damage,
resulting
in
pathophysiology
that
“hides”
behind
normal
thresholds.
Prior
single-fiber
neurophysiology
guinea
pig
suggested
noise
selectively
targets
high-threshold
ANFs.
Here,
we
show
the
lingering
differs
mouse,
with
both
ANF
groups
affected
a
paradoxical
gain-of-function
surviving
low-threshold
fibers,
including
increased
onset
rate,
decreased
jitter,
reduced
maskability.
Frontiers in Neuroscience,
Journal Year:
2022,
Volume and Issue:
16
Published: June 8, 2022
Noise
is
generally
considered
to
harm
information
processing
performance.
However,
in
the
context
of
stochastic
resonance,
noise
has
been
shown
improve
signal
detection
weak
sub-
threshold
signals,
and
it
proposed
that
brain
might
actively
exploit
this
phenomenon.
Especially
within
auditory
system,
recent
studies
suggest
intrinsic
plays
a
key
role
even
correspond
increased
spontaneous
neuronal
firing
rates
observed
early
stages
stem
cortex
after
hearing
loss.
Here
we
present
computational
model
pathway
based
on
deep
neural
network,
trained
speech
recognition.
We
simulate
different
levels
loss
investigate
effect
noise.
Remarkably,
recognition
actually
improves
with
additional
This
surprising
result
indicates
not
only
play
crucial
human
processing,
but
be
beneficial
for
contemporary
machine
learning
approaches.
Human Brain Mapping,
Journal Year:
2024,
Volume and Issue:
45(3)
Published: Feb. 15, 2024
Abstract
The
hippocampus
and
parahippocampal
gyrus
have
been
implicated
as
part
of
a
tinnitus
network
by
number
studies.
These
structures
are
usually
considered
in
the
context
“limbic
system,”
concept
typically
invoked
to
explain
emotional
response
tinnitus.
Despite
this
common
framing,
it
is
not
apparent
from
current
literature
that
necessarily
main
functional
role
these
persistent
Here,
we
highlight
different
encompasses
their
most
commonly
position
within
brain—that
is,
memory
system.
We
consider
an
auditory
object
held
memory,
which
may
be
made
associated
activity
gyrus.
Evidence
animal
human
studies
implicating
reviewed
used
anchor
for
hypothesis.
potential
hippocampus/parahippocampal
facilitate
maintenance
percept
via
communication
with
cortex,
rather
than
(or
addition
to)
mediating
responses
percept.
Neurons
in
sensory
cortex
exhibit
a
remarkable
capacity
to
maintain
stable
firing
rates
despite
large
fluctuations
afferent
activity
levels.
However,
sudden
peripheral
deafferentation
adulthood
can
trigger
an
excessive,
non-homeostatic
cortical
compensatory
response
that
may
underlie
perceptual
disorders
including
hypersensitivity,
phantom
limb
pain,
and
tinnitus.
Here,
we
show
mice
with
noise-induced
damage
of
the
high-frequency
cochlear
base
were
behaviorally
hypersensitive
spared
mid-frequency
tones
direct
optogenetic
stimulation
auditory
thalamocortical
neurons.
Chronic
two-photon
calcium
imaging
from
ACtx
pyramidal
neurons
(PyrNs)
revealed
initial
stage
spatially
diffuse
hyperactivity,
hyper-correlation,
hyperresponsivity
consolidated
around
deafferented
map
regions
three
or
more
days
after
acoustic
trauma.
Deafferented
PyrN
ensembles
also
displayed
decoding
mirrored
behavioral
suggesting
regulation
sound
intensity
coding
following
sensorineural
loss
be
underlying
source
hypersensitivity.
Excess
gain
trauma
was
expressed
heterogeneously
among
individual
PyrNs,
yet
40%
this
variability
could
accounted
for
by
each
cell’s
baseline
properties
prior
PyrNs
initially
high
spontaneous
gradual
monotonic
growth
functions
likely
excess
This
suggests
while
changes
are
triggered
reduced
bottom-up
input,
their
subsequent
stabilization
is
shaped
local
circuit
milieu,
where
indicators
inhibition
presage
pathological
hyperactivity
hearing
loss.
Frontiers in Neural Circuits,
Journal Year:
2022,
Volume and Issue:
15
Published: Jan. 6, 2022
Neuronal
hyperexcitability
in
the
central
auditory
pathway
linked
to
reduced
inhibitory
activity
is
associated
with
numerous
forms
of
hearing
loss,
including
noise
damage,
age-dependent
and
deafness,
as
well
tinnitus
or
processing
deficits
autism
spectrum
disorder
(ASD).
In
most
cases,
accompanying
are
interpreted
an
active
compensatory
response
absence
synaptic
activity,
increased
neural
gain
control
(increased
output
relative
input).
We
here
suggest
that
also
could
be
related
immaturity
impairment
tonic
strength
typically
develops
activity-dependent
process
ascending
experience.
these
high-SR
nerve
fibers,
which
critical
for
shortest
latencies
lowest
sound
thresholds,
may
have
either
not
matured
(possibly
congenital
deafness
autism)
dysfunctional
after
sudden,
stressful
trauma
loss
cognitive
decline).
Fast
can
occur
despite
maintained
basal
hearing.
case,
nuclei,
fast
parvalbumin
positive
interneuron
(PV-IN)
dendrites
diminished
frontal
brain
regions.
This
leads
hippocampal
LTP/LTD
deficiencies,
deficits,
unbalanced
extra-hypothalamic
stress
control.
Under
conditions,
a
weaken
local
neuronal
coupling
homeostatic
vascular
responses
required
metabolic
support
adjustment
processes.
emphasize
need
distinguish
two
states
excitatory/inhibitory
imbalance
disorders:
(i)
conditions
preserved
sustained
strength,
following
deprivation
maintain
precise
through
memory
linked,
transient
disinhibition
enhanced
spiking
fidelity
(central
gain⇑)
(ii)
critically
part
synchronization
over
broader
frequency
range,
reliability
gain⇓).
latter
stage
mutually
reinforces
processes,
increasing
risks
canonical
dementia
syndromes.