European Journal of Neuroscience,
Journal Year:
2023,
Volume and Issue:
59(2), P. 220 - 237
Published: Dec. 13, 2023
Separable
striatal
circuits
have
unique
functions
in
Pavlovian
and
instrumental
behaviors
but
how
these
roles
relate
to
performance
of
sequences
actions
with
without
associated
cues
are
less
clear.
Here,
we
tested
whether
dopamine
transmission
neural
activity
more
generally
three
subdomains
necessary
for
an
action
chain
leading
reward
delivery.
Male
female
Long-Evans
rats
were
trained
press
a
series
spatially
distinct
levers
receive
reward.
We
assessed
the
contribution
or
within
each
subdomain
when
progression
through
sequence
was
explicitly
cued
absence
cues.
Behavior
both
task
variations
substantially
impacted
following
microinfusion
antagonist,
flupenthixol,
into
nucleus
accumbens
core
(NAc)
dorsomedial
striatum
(DMS),
impairments
timing
numbers
rewards
earned
after
NAc
flupenthixol.
In
contrast,
pharmacological
inactivation
suppress
overall
activity,
there
minimal
impact
on
total
earned.
Instead,
DMS
impaired
led
errors
uncued,
not
task.
There
no
antagonism
reversible
dorsolateral
either
uncued
completion.
These
results
highlight
essential
systems
motivational
aspects
chains
actions,
internally
generated,
as
well
intact
function
correct
performance.
bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2023,
Volume and Issue:
unknown
Published: March 2, 2023
Abstract
Behavior
is
often
dichotomized
into
model-free
and
model-based
systems
1,
2
.
Model-free
behavior
prioritizes
associations
that
have
high
value,
regardless
of
the
specific
consequence
or
circumstance.
In
contrast,
involves
considering
all
possible
outcomes
to
produce
best
fits
current
We
typically
exhibit
a
mixture
these
behaviors
so
we
can
trade-off
efficiency
flexibility.
However,
substance
use
disorder
shifts
more
strongly
towards
systems,
which
produces
difficulty
abstaining
from
drug-seeking
due
an
inability
withhold
making
high-value
response
3–10
The
lateral
hypothalamus
(LH)
implicated
in
11–17
demonstrated
this
region
critical
Pavlovian
cue-reward
learning
18,
19
it
unknown
whether
occurring
LH
model-based,
where
necessary
teaching
signal
comes
facilitate
LH,
relevant
for
deficits
drive
disorder.
Here,
reveal
model-based.
Further,
confirm
existence
understudied
projection
extending
dopamine
neurons
ventral
tegmental
area
(VTA)
demonstrate
input
underlies
LH.
Finally,
examine
impact
methamphetamine
self-administration
on
LH-dependent
processes.
These
experiments
history
administration
enhances
control
cues
over
decision-making,
was
accompanied
by
bidirectional
strengthening
VTA
circuit.
Together,
work
reveals
novel
circuit
behavioral
cognitive
changes
arise
with
disorders.
This
represents
new
addition
models
addiction,
focus
instrumental
components
drug
addiction
increases
habits
after
exposure
Before
we
can
make
any
choice,
must
gather
information
from
the
environment
about
what
our
options
are.
This
information-gathering
process
is
critically
mediated
by
attention,
and
attention
is,
in
turn,
shaped
previous
experiences
with—and
learning
about—stimuli
their
consequences.
In
this
review
highlight
studies
demonstrating
a
rapid
automatic
influence
of
reward
on
attentional
capture,
argue
that
these
findings
provide
human
analogue
sign-tracking
behaviour
observed
non-human
animals
–
wherein
signals
gain
incentive
salience
become
attractive
targets
for
(and
overt
behaviour)
own
right.
We
then
consider
implications
idea
understanding
drivers
cue-controlled
behaviour,
with
focus
addiction
as
case
which
choices
regard
to
reward-related
stimuli
injurious
health.
motivated
general—and
particular—can
be
understood
within
‘biased
competition’
framework:
different
outcomes
compete
priority
function
top-down
goals,
bottom-up
salience,
prior
experience,
winner
competition
becomes
target
subsequent
outcome-directed
flexible
behaviour.
Finally,
outline
biased-competition
framework
cognitive,
behavioural,
socioeconomic
interventions
addiction.
bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2024,
Volume and Issue:
unknown
Published: Feb. 21, 2024
Abstract
As
animals
perform
instrumental
tasks,
they
may
develop
a
habit
response
with
extended
experience.
Habits
are
automatic,
inflexible,
outcome
value
insensitive
behaviors
that
regulated
by
network
of
brain
regions
including
the
central
nucleus
amygdala
(CeA).
Prior
work
has
demonstrated
CeA
governs
motivational
pursuit
and
is
necessary
for
formation.
However,
behavioral
features
neurons
encode
in
formation
remain
relatively
unknown.
To
address
this,
we
first
used
male
female
Long-Evans
rats
to
quantify
cFos
expression
after
performance
maze
task.
There,
found
training
show
elevated
expression.
Then,
implanted
drivable
silicon
probes
record
in-vivo
single
unit
electrophysiological
activity
from
as
developed
responding
on
maze.
We
observed
significant
during
consumption
late
while
also
observing
when
consumed
outcomes
larger
magnitudes.
Outcome
related
did
not
persist
probe
tests
following
devaluation,
despite
continuing
Together,
these
data
add
growing
evidence
suggests
involved
processes
contribute
development
iScience,
Journal Year:
2024,
Volume and Issue:
27(5), P. 109652 - 109652
Published: April 1, 2024
Dysregulation
of
the
central
amygdala
is
thought
to
underlie
aberrant
choice
in
alcohol
use
disorder,
but
role
neural
activity
during
reward
and
consumption
unclear.
We
recorded
neurons
male
rats
as
they
consumed
or
sucrose.
observed
changes
at
time
approach,
well
lick-entrained
ongoing
both
rewards.
In
scenarios
where
could
drink
sucrose,
alcohol,
quinine-adulterated
with
without
optogenetic
stimulation,
drank
more
stimulation-paired
options
when
two
bottles
contained
identical
options.
Given
a
among
different
options,
stimulation
usually
enhanced
However,
less-preferred
option,
was
unable
enhance
intake
while
sucrose
available.
These
findings
indicate
that
contributes
refining
motivated
pursuit
toward
preferred
available
option.
Journal of Behavioral Addictions,
Journal Year:
2024,
Volume and Issue:
13(2), P. 429 - 449
Published: April 24, 2024
Compulsivity
contributes
to
the
development
and
maintenance
of
multiple
addictive
disorders.
However,
relationship
between
compulsivity-related
cognitive
features
problematic
usage
internet
(PUI),
an
umbrella
term
for
various
use
disorders/interfering
behaviors,
remains
largely
unclear,
partly
due
multidimensional
nature
compulsivity.
This
scoping
review
utilized
a
four-domain
framework
compulsivity
consider
this
topic
aimed
summarize
available
evidence
on
neuropsychological
characteristics
in
PUI
based
framework.
iScience,
Journal Year:
2022,
Volume and Issue:
26(1), P. 105818 - 105818
Published: Dec. 16, 2022
We
previously
reported
the
rapid
development
of
habitual
behavior
in
a
discrete-trials
instrumental
task
which
lever
insertion
and
retraction
act
as
reward-predictive
cues
delineating
sequence
execution.
Here
we
asked
whether
or
performance
variables
reflective
skill
automaticity
might
account
for
male
rats.
Behavior
habit-promoting
was
compared
with
two
variants
lacking
sequence-delineating
extension
retraction.
find
that
is
under
goal-directed
control
absence
but
not
their
presence,
skilled
does
predict
vs.
behavior.
Neural
activity
recordings
revealed
an
engagement
dorsolateral
striatum
disengagement
dorsomedial
during
execution
task,
specifically.
Together,
these
results
indicate
delineation
promote
habit
differential
striatal
subregions
responding,
pattern
may
reflect
cue-elicited
behavioral
chunking.
Neuropsychopharmacology,
Journal Year:
2021,
Volume and Issue:
47(8), P. 1440 - 1448
Published: Dec. 16, 2021
Abstract
How
does
craving
bias
decisions
to
pursue
drugs
over
other
valuable,
and
healthier,
alternatives
in
addiction?
To
address
this
question,
we
measured
the
in-the-moment
economic
of
people
with
opioid
use
disorder
as
they
experienced
craving,
shortly
after
receiving
their
scheduled
maintenance
medication
~24
h
later.
We
found
that
higher
cravers
had
drug-related
valuation,
moments
within-person
also
led
valuation.
When
experiencing
increased
participants
were
willing
pay
more
for
personalized
consumer
items
foods
closely
related
drug
use,
but
not
alternative
“nondrug-related”
equally
desirable
options.
This
selective
increase
value
was
greater
when
options
offered
quantities
separable
from
effects
fluctuating
psychological
states
like
negative
mood.
These
findings
suggest
narrows
focuses
motivation
toward
object
by
selectively
multiplicatively
amplifying
perceived
along
a
“drug
relatedness”
dimension.