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.
Learning & Behavior,
Journal Year:
2021,
Volume and Issue:
49(4), P. 349 - 362
Published: Oct. 28, 2021
Abstract
This
article
reviews
recent
findings
from
the
author’s
laboratory
that
may
provide
new
insights
into
how
habits
are
made
and
broken.
Habits
extensively
practiced
behaviors
automatically
evoked
by
antecedent
cues
performed
without
their
goal
(or
reinforcer)
“in
mind.”
Goal-directed
actions,
in
contrast,
instrumental
because
is
remembered
valued.
New
results
suggest
actions
transition
to
habit
after
extended
practice
when
conditions
encourage
reduced
attention
behavior.
Consistent
with
theories
of
learning,
a
behavior
command
less
(and
become
habitual)
as
its
reinforcer
becomes
well-predicted
environment;
learning
prevented
if
presentation
uncertain.
Other
not
permanent,
goal-direction
can
be
restored
several
environmental
manipulations,
including
exposure
unexpected
reinforcers
or
context
change.
more
context-dependent
than
goal-directed
are.
Habit
causes
retroactive
interference
way
reminiscent
extinction:
It
inhibits,
but
does
erase,
way.
The
have
implications
for
understanding
habitual
control
well
disordered
like
addictions.
Frontiers in Neural Circuits,
Journal Year:
2021,
Volume and Issue:
15
Published: Nov. 9, 2021
Addiction
is
a
complex
disease
that
impacts
millions
of
people
around
the
world.
Clinically,
addiction
formalized
as
substance
use
disorder
(SUD),
with
three
primary
symptom
categories:
exaggerated
use,
social
or
lifestyle
impairment,
and
risky
use.
Considerable
efforts
have
been
made
to
model
features
these
criteria
in
non-human
animal
research
subjects,
for
insight
into
underlying
neurobiological
mechanisms.
Here
we
review
evidence
from
rodent
models
SUD-inspired
criteria,
focusing
on
role
striatal
dopamine
system.
We
identify
distinct
mesostriatal
nigrostriatal
circuit
functions
behavioral
outcomes
are
relevant
addictions
SUDs.
This
work
suggests
essential
not
only
positive
SUDs,
such
elevated
intake
craving,
but
also
impairments
decision
making
underlie
compulsive
behavior,
reduced
sociality,
risk
taking.
Understanding
functional
heterogeneity
system
related
networks
can
offer
this
symptomatology
may
lead
more
targeted
treatments.
Oxford University Press eBooks,
Journal Year:
2025,
Volume and Issue:
unknown, P. 651 - 660
Published: Jan. 1, 2025
Abstract
Substance
use
disorders
(SUDs)
are
characterized
by
chronic
relapsing
episodes
of
drug
seeking
and/or
taking,
often
despite
negative
outcomes.
Although
animal
models
cannot
recapitulate
all
aspects
SUDs
because
the
complexities
societal
interactions
and
human-specific
processing
rewards
affect,
there
many
components
that
can
be
effectively
modeled.
This
chapter
reviews
key
concepts,
advantages,
caveats
using
to
study
initiation,
maintenance,
escalation
taking
adverse
consequences,
abstinence
relapse.
The
discusses
have
direct
translational
impact
where
interpretation
limitations.
It
also
used
interrogate
both
genetic
environmental
factors
influencing
vulnerability
at
different
stages
SUD.
Animal
made
important
contributions
current
knowledge
drug-mediated
responses
adaptations
brain
circuitry
could
never
been
acquired
via
human
research.
Addiction Biology,
Journal Year:
2024,
Volume and Issue:
29(5)
Published: May 1, 2024
Abstract
Opioid
addiction
is
a
relapsing
disorder
marked
by
uncontrolled
drug
use
and
reduced
interest
in
normally
rewarding
activities.
The
current
study
investigated
the
impact
of
spontaneous
withdrawal
from
chronic
morphine
exposure
on
emotional,
motivational
cognitive
processes
involved
regulating
pursuit
consumption
food
rewards
male
rats.
In
Experiment
1,
rats
experiencing
acute
lost
weight
displayed
somatic
signs
dependence.
However,
hedonically
driven
sucrose
was
significantly
elevated,
suggesting
intact
potentially
heightened
reward
processing.
2,
undergoing
motivation
when
performing
an
effortful
response
for
palatable
reward.
Subsequent
devaluation
testing
revealed
that
disrupted
their
ability
to
exert
flexible
goal‐directed
control
over
seeking.
Specifically,
morphine‐withdrawn
were
impaired
using
value
select
actions
both
relying
prior
action‐outcome
learning
given
direct
feedback
about
consequences
actions.
3,
tested
after
prolonged
rather
than
diminished
retained
engage
action
selection.
brief
re‐exposure
sufficient
impair
disrupt
selection,
though
this
case,
only
presence
morphine‐paired
context
cues
absence
response‐contingent
feedback.
We
suggest
these
opioid‐withdrawal
induced
deficits
may
contribute
interfering
with
adaptive
alternatives
use.
Alcohol and Alcoholism,
Journal Year:
2024,
Volume and Issue:
59(3)
Published: March 16, 2024
Abstract
Aims
This
study
aimed
to
compare
reward,
relief,
and
habit
treatment-seeking
individuals
on
recent
drinking,
alcohol
use
disorder
(AUD)
phenomenology,
mood.
The
second
aim
of
the
was
evaluate
predictive
validity
profiles.
Method
Treatment-seeking
with
an
AUD
(n
=
169)
were
recruited
participate
in
a
medication
trial
for
(NCT03594435).
Reward,
drinking
groups
assessed
using
UCLA
Reward
Relief
Habit
Drinking
Scale.
Group
differences
at
baseline
evaluated
univariate
analyses
variance.
A
subset
participants
enrolled
12-week,
double-blind,
placebo-controlled
102),
provided
longitudinal
phenomenology
data.
group
membership
linear
regression
analyses.
Results
At
baseline,
who
drink
primarily
relief
had
higher
craving
negative
mood
than
those
reward
habit.
Prospectively,
predicted
greater
use,
heavy
fewer
days
abstinent
compared
group.
Membership
also
craving,
more
alcohol-related
consequences,
anxiety
symptoms
over
12
weeks
Conclusions
provides
support
motive
profiles
AUD.
poorer
outcomes
symptomology
weeks,
indicating
that
may
be
particularly
vulnerable
sub-population