bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Март 13, 2024
Turning
on
cue
or
stopping
at
a
red
light
requires
attending
to
such
cues
select
action
sequences,
suppress
action,
in
accordance
with
learned
cue-associated
rules.
Cortico-striatal
projections
are
an
essential
part
of
the
brain's
attention-motor
interface.
Glutamate-sensing
microelectrode
arrays
were
used
measure
glutamate
transients
dorsomedial
striatum
(DMS)
male
and
female
rats
walking
treadmill
executing
cued
turns
stops.
Prelimbic-DMS
chemogenetically
inhibited
determine
their
behavioral
necessity
cortico-striatal
origin
cue-evoked
transients.
Furthermore,
we
investigated
exhibiting
preferably
goal-directed
(goal
trackers,
GTs)
versus
cue-driven
attention
(sign
STs),
impact
cognitive-motivational
biases
control.
GTs
executed
more
initiated
slowly
than
STs.
During
turns,
but
not
missed
stops,
concentrations
higher
In
STs,
turn
cue-locked
frequently
peaked
twice
three
times,
contrasting
predominately
single
peaks
GTs.
GTs,
inhibition
prelimbic-DMS
attenuated
rates
increased
number
peaks.
These
findings
indicate
that
release
is
tightly
controlled
by
neuronal
activity.
contrast,
from
DMS
glutamatergic
terminals
may
be
regulated
other
striatal
circuitry,
mediating
suppression
reward
tracking.
As
dysfunction
has
been
hypothesized
contribute
wide
range
disorders,
including
complex
movement
control
deficits
Parkinson's
disease
compulsive
drug
taking,
demonstration
phenotypic
contrasts
implies
presence
individual
vulnerabilities
for
disorders.
Adaptive
behavior
involves
selection
behaviorally
significant
capacity
selected
action.
Neuronal
cortex
integration
attentional
motor
functions.
Here
demonstrated
primarily
influences
actions
(cued
stops).
turning
was
especially
powerful
which,
as
psychological
trait,
deploy
attention.
Together,
our
demonstrate
role
input
selection,
they
emphasize
experimental
biopsychological
significance
investigating
attentional-motor
interface
context
broader
differences
styles.
Cells,
Год журнала:
2023,
Номер
12(12), С. 1599 - 1599
Опубликована: Июнь 10, 2023
Apathy
is
commonly
defined
as
a
loss
of
motivation
leading
to
reduction
in
goal-directed
behaviors.
This
multidimensional
syndrome,
which
includes
cognitive,
emotional
and
behavioral
components,
one
the
most
prevalent
neuropsychiatric
features
Parkinson’s
disease
(PD).
It
has
been
established
that
prevalence
apathy
increases
PD
progresses.
However,
pathophysiology
anatomic
substrate
this
syndrome
remain
unclear.
seems
be
underpinned
by
impaired
anatomical
structures
link
prefrontal
cortex
with
limbic
system.
can
encountered
prodromal
stage
fluctuating
patients
receiving
bilateral
chronic
subthalamic
nucleus
stimulation.
In
these
stages,
may
considered
disorder
embodies
amotivational
combined
dopaminergic
serotonergic
denervation
dopa-responsive.
contrast,
advanced
patients,
cognitive
announces
decline
dementia,
diffuse
neurotransmitter
system
dysfunction
Lewy
pathology
spreading
no
longer
review,
we
discuss
clinical
patterns
their
treatment,
neurobiological
basis
apathy,
potential
role
involved
pathways
motivational
apathy.
Brain,
Год журнала:
2024,
Номер
147(6), С. 1937 - 1952
Опубликована: Янв. 27, 2024
Abstract
In
recent
years
there
has
been
a
renewed
interest
in
the
basal
forebrain
cholinergic
system
as
target
for
treatment
of
cognitive
impairments
patients
with
Parkinson’s
disease,
due
part
to
need
explore
novel
approaches
treat
symptoms
disease
and
development
more
refined
imaging
tools
that
have
made
it
possible
monitor
progressive
changes
structure
function
they
evolve
over
time.
parallel,
emerging
technologies
allowing
derivation
authentic
neurons
from
human
pluripotent
stem
cells
are
providing
new
powerful
exploration
neuron
replacement
animal
models
disease-like
decline.
this
review,
we
discuss
rationale
cell
potential
therapeutic
strategy
how
approach
can
be
explored
rodent
decline,
building
on
insights
gained
extensive
experimental
work
was
performed
primate
1980s
90s.
Although
therapies
targeting
so
far
focused
mainly
Alzheimer’s
dementia
may
relevant
condition.
dementia,
undergoes
degeneration
magnitude
loss
shown
correlate
level
impairment.
Thus,
therapy
aimed
replace
lost
represents
an
interesting
combat
some
major
dementia.
Abstract
The
cerebral
cortex
has
long
been
thought
to
be
involved
in
the
pathophysiology
of
motor
symptoms
Parkinson’s
disease.
impaired
cortical
function
is
believed
a
direct
and
immediate
effect
pathologically
patterned
basal
ganglia
output,
mediated
by
way
ventral
thalamus.
However,
recent
studies
humans
with
disease
animal
models
have
provided
strong
evidence
suggesting
that
involvement
much
broader
than
merely
serving
as
passive
conduit
for
subcortical
disturbances.
In
present
review,
we
discuss
disease–related
changes
frontal
regions,
focusing
on
neuropathology,
plasticity,
neurotransmission,
altered
network
interactions.
We
will
also
examine
exploring
circuits
potential
targets
neuromodulation
treat
Brain Communications,
Год журнала:
2022,
Номер
4(6)
Опубликована: Ноя. 2, 2022
Abstract
Cortical
cholinergic
deficits
contribute
to
cognitive
decline
and
other
in
Parkinson's
disease.
Cross-sectional
imaging
studies
suggest
a
stereotyped
pattern
of
posterior-to-anterior
cortical
denervation
accompanying
disease
progression
We
used
serial
acetylcholinesterase
PET
ligand
characterize
the
trajectory
regional
synapse
disease,
testing
hypothesis
deficits.
The
16
subjects
(4
females/12
males;
mean
age:
64.4
±
6.7
years;
duration:
5.5
4.2
Hoehn
&
Yahr
stage:
2.3
0.6
at
entry)
completed
11C-methyl-4-piperidinyl
propionate
scans
over
4–8
year
period
(median
5
years).
Three-dimensional
stereotactic
surface
projections
volume-of-interest
analyses
were
performed.
Cholinergic
integrity
was
assessed
by
magnitude,
k3,
hydrolysis
propionate.
Based
on
normative
data,
we
generated
Z-score
maps
for
both
k3
k1
parameters,
latter
as
proxy
cerebral
blood
flow.
Compared
with
control
subjects,
baseline
showed
predominantly
posterior
Parkinson’s
subjects.
Interval
change
evidence
cortices.
In
frontal
cortices,
an
opposite
gradient
anterior-to-posterior
found.
topography
changes
exhibited
regionally
specific
disconnection
from
changes.
Interval-change
analysis
based
k3/k1
ratio
images
(k3
adjustment
flow
changes)
interval
reductions
(up
20%)
ventral
frontal,
anterior
cingulate
Brodmann
area
6
contrast,
especially
areas
17–19,
largely
proportional
Our
results
partially
support
progressive
posterior-to-cortical
This
appears
characteristic
activity
declining
flow,
suggesting
that
are
part
generalized
loss
synapses.
disproportionate
relative
suggests
preferential
or
dysregulation
synapses
these
regions.
observations
vulnerability
is
mediated
diffuse
processes
affecting
subpopulations
afferents.
Frontiers in Neuroscience,
Год журнала:
2024,
Номер
18
Опубликована: Апрель 30, 2024
Parkinson’s
disease
(PD)
is
characterized
by
three
main
motor
symptoms:
bradykinesia,
rigidity
and
tremor.
PD
also
associated
with
diverse
non-motor
symptoms
that
may
develop
in
parallel
or
precede
dysfunctions,
ranging
from
autonomic
system
dysfunctions
impaired
sensory
perception
to
cognitive
deficits
depression.
Here,
we
examine
the
role
of
progressive
loss
dopaminergic
transmission
behaviors
related
a
mouse
model
(the
TIF-IA
DATCreERT2
strain).
We
found
period
5
12
weeks
after
induction
gradual
neurons,
mild
became
detectable,
including
changes
distance
between
paws
while
standing
as
well
swing
speed
step
sequence.
Male
mutant
mice
showed
no
apparent
olfactory
acuity,
anhedonia-like
behaviors,
normal
learning
an
instrumental
task;
however,
pronounced
increase
number
operant
responses
performed
was
noted.
Similarly,
female
neuron
degeneration
probabilistic
reversal
task
sweet-taste
preference,
but
again,
robustly
higher
choices
were
task.
In
both
males
females,
did
not
affect
accuracy
fraction
rewarded
responses.
Taken
together,
these
data
reveal
discrete,
dopamine-dependent
emerge
early
stages
degeneration.
Turning
on
cue
or
stopping
at
a
red
light
requires
attending
to
such
cues
select
action
sequences,
suppress
action,
in
accordance
with
learned
cue-associated
rules.
Cortico-striatal
projections
are
an
essential
part
of
the
brain’s
attention-motor
interface.
Glutamate-sensing
microelectrode
arrays
were
used
measure
glutamate
transients
dorsomedial
striatum
(DMS)
male
and
female
rats
walking
treadmill
executing
cued
turns
stops.
Prelimbic-DMS
chemogenetically
inhibited
determine
their
behavioral
necessity
cortico-striatal
origin
cue-evoked
transients.
Furthermore,
we
investigated
exhibiting
preferably
goal-directed
(goal
trackers,
GTs)
versus
cue-driven
attention
(sign
STs),
impact
cognitive-motivational
biases
control.
GTs
executed
more
initiated
slowly
than
STs.
During
turns,
but
not
missed
stops,
concentrations
higher
In
STs,
turn
cue-locked
frequently
peaked
twice
three
times,
contrasting
predominately
single
peaks
GTs.
GTs,
inhibition
prelimbic-DMS
attenuated
rates
increased
number
peaks.
These
findings
indicate
that
release
is
tightly
controlled
by
neuronal
activity.
contrast,
from
DMS
glutamatergic
terminals
may
be
regulated
other
striatal
circuitry,
mediating
suppression
reward
tracking.
As
dysfunction
has
been
hypothesized
contribute
wide
range
disorders,
including
complex
movement
control
deficits
Parkinson’s
disease
compulsive
drug
taking,
demonstration
phenotypic
contrasts
implies
presence
individual
vulnerabilities
for
disorders.