Frontiers in Psychology,
Год журнала:
2025,
Номер
16
Опубликована: Апрель 9, 2025
To
support
goal-directed
behavior,
working
memory
(WM)
must
flexibly
access
relevant
information.
While
the
mechanisms
underlying
single-item
WM
are
comparatively
well-studied,
less
is
known
about
principles
governing
multi-item
access.
Some
studies
have
suggested
that
dual-item
retrieval
can
be
as
efficient
access,
but
it
remains
unclear
whether
this
reflects
reduced
inhibitory
demands
or
truly
parallel,
cost-free
retrieval.
In
Experiment
1,
we
manipulated
number
of
vs.
irrelevant
items
in
a
pre-and
retro-cuing
task.
The
rationale
was
if
benefit
then
having
fewer
to
suppress
would
enhance
performance.
Instead,
found
selecting
two
out
three
slower
and
accurate
than
one,
arguing
against
idea
diminished
inhibition
underlies
efficiency.
Experiments
2a
2b
further
probed
efficiency
using
modified
dual-access
paradigm
leveraged
object
repetition
benefits.
By
including
control
condition
prevent
temporal
associations
between
repeated
targets
non-targets,
observed
benefits
for
each
item
were
additive-consistent
with
serial
limited
parallel
retrieval-rather
overadditive,
which
expected
under
fully
These
findings
clarify
key
limitations
WM,
important
implications
complex
tasks
such
language
comprehension,
decision-making,
problem
solving.
Classic
models
consider
working
memory
(WM)
and
long-term
as
distinct
mental
faculties
that
are
supported
by
different
neural
mechanisms.
Yet,
there
significant
parallels
in
the
computation
both
types
of
require.
For
instance,
representation
precise
item-specific
requires
separation
overlapping
representations
similar
information.
This
has
been
referred
to
pattern
separation,
which
can
be
mediated
entorhinal-DG/CA3
pathway
medial
temporal
lobe
(MTL)
service
episodic
memory.
However,
although
recent
evidence
suggested
MTL
is
involved
WM,
extent
supports
WM
remained
elusive.
Here,
we
combine
an
established
orientation
task
with
high-resolution
fMRI
test
hypothesis
retains
visual
a
simple
surface
feature.
Participants
were
retrospectively
cued
retain
one
two
studied
gratings
during
brief
delay
period
then
tried
reproduce
precisely
possible.
By
modeling
delay-period
activity
reconstruct
retained
content,
found
anterior-lateral
entorhinal
cortex
(aLEC)
hippocampal
DG/CA3
subfield
contain
information
associated
subsequent
recall
fidelity.
Together,
these
results
highlight
contribution
circuitry
representation.
Current Opinion in Behavioral Sciences,
Год журнала:
2024,
Номер
59, С. 101433 - 101433
Опубликована: Июль 4, 2024
Brain
rhythms
are
known
to
play
a
relevant
role
in
many
cognitive
functions.
In
particular,
coupling
between
theta
and
gamma
oscillations
was
first
observed
the
hippocampus,
where
it
is
assumed
implement
code
for
organizing
multiple
items
memory.
More
recent
advances,
however,
demonstrate
that
this
mechanism
ubiquitously
present
brain
plays
not
only
working
memory
but
also
episodic
semantic
memory,
attention,
emotion,
dreaming,
imagination.
Furthermore,
altered
mental
states
neurological
disorders
show
profound
alterations
theta–gamma
code.
review,
which
summarizes
most
experimental
theoretical
evidence,
we
suggest
substantial
capacity
integrate
information
characteristic
of
entrainment
fundamental
implementing
conscious
processes.
Recent
studies
have
proposed
that
visual
information
in
working
memory
(WM)
can
be
maintained
an
activity-silent
state
and
reactivated
by
task-irrelevant
high-contrast
impulses
("ping").
Although
pinging
the
brain
has
become
a
popular
tool
for
exploring
WM,
its
underlying
mechanisms
remain
unclear.
In
current
study,
we
directly
compared
neural
reactivation
effects
behavioral
consequences
of
spatial-nonmatching
spatial-matching
pings
to
distinguish
noise-reduction
target-interaction
hypotheses
brain.
Initially,
electroencephalogram
our
decoding
results
showed
WM
transiently
without
changing
original
representations
or
recall
performance.
Conversely,
more
durably
further
reorganized
decreasing
representations'
dynamics.
Notably,
only
strength
correlated
with
performance
was
modulated
location
memorized
items,
occurring
when
both
items
were
presented
horizontally.
Consistently,
follow-up
found
spatial-matching,
horizontal
impaired
no
ping.
Together,
demonstrated
two
distinct
brain,
highlighting
critical
role
ping's
context
(i.e.
spatial
information)
reactivating
reorganizing
WM.
Frontiers in Psychology,
Год журнала:
2025,
Номер
16
Опубликована: Апрель 9, 2025
To
support
goal-directed
behavior,
working
memory
(WM)
must
flexibly
access
relevant
information.
While
the
mechanisms
underlying
single-item
WM
are
comparatively
well-studied,
less
is
known
about
principles
governing
multi-item
access.
Some
studies
have
suggested
that
dual-item
retrieval
can
be
as
efficient
access,
but
it
remains
unclear
whether
this
reflects
reduced
inhibitory
demands
or
truly
parallel,
cost-free
retrieval.
In
Experiment
1,
we
manipulated
number
of
vs.
irrelevant
items
in
a
pre-and
retro-cuing
task.
The
rationale
was
if
benefit
then
having
fewer
to
suppress
would
enhance
performance.
Instead,
found
selecting
two
out
three
slower
and
accurate
than
one,
arguing
against
idea
diminished
inhibition
underlies
efficiency.
Experiments
2a
2b
further
probed
efficiency
using
modified
dual-access
paradigm
leveraged
object
repetition
benefits.
By
including
control
condition
prevent
temporal
associations
between
repeated
targets
non-targets,
observed
benefits
for
each
item
were
additive-consistent
with
serial
limited
parallel
retrieval-rather
overadditive,
which
expected
under
fully
These
findings
clarify
key
limitations
WM,
important
implications
complex
tasks
such
language
comprehension,
decision-making,
problem
solving.
