Dissecting abstract, modality-specific and experience-dependent coding of affect in the human brain
Science Advances,
Год журнала:
2024,
Номер
10(10)
Опубликована: Март 8, 2024
Emotion
and
perception
are
tightly
intertwined,
as
affective
experiences
often
arise
from
the
appraisal
of
sensory
information.
Nonetheless,
whether
brain
encodes
emotional
instances
using
a
sensory-specific
code
or
in
more
abstract
manner
is
unclear.
Here,
we
answer
this
question
by
measuring
association
between
emotion
ratings
collected
during
unisensory
multisensory
presentation
full-length
movie
activity
recorded
typically
developed,
congenitally
blind
deaf
participants.
Emotional
encoded
vast
network
encompassing
sensory,
prefrontal,
temporal
cortices.
Within
network,
ventromedial
prefrontal
cortex
stores
categorical
representation
independent
modality
previous
experience,
posterior
superior
maps
valence
dimension
an
code.
Sensory
experience
than
affects
how
organizes
information
outside
supramodal
regions,
suggesting
existence
scaffold
for
states
where
inputs
development
shape
its
functioning.
Язык: Английский
Abnormal Alterations of the White Matter Structural Network in Patients with Herpes Zoster and Postherpetic Neuralgia
Brain Topography,
Год журнала:
2025,
Номер
38(2)
Опубликована: Фев. 6, 2025
Язык: Английский
Semantic representations in the visual cortex of blind and sighted humans
Małgorzata Paczyńska,
Marta Urbaniak,
Marta Dębecka
и другие.
Опубликована: Апрель 17, 2025
In
blind
humans,
the
“visual”
cortex
responds
to
linguistic
stimuli,
such
as
words
and
sentences.
This
is
sometimes
taken
evidence
that
this
brain
region
supports
starkly
different
computations
in
sighted
individuals.
Here,
we
challenge
view
show
that,
during
word
processing,
visual
areas
these
two
populations
represent
same
semantic
dimension
–
knowledge
about
physical
properties
of
referents.
Using
analysis
fMRI
activation
patterns,
found
both
congenitally
participants
represented
differences
between
individual
words.
groups,
patterns
for
reflected
physical,
but
not
conceptual
similarity
Furthermore,
between-group
correlations
were
comparable
within-group
correlations.
Finally,
groups
showed
greatest
“representational
connectivity”
occipitotemporal
areas.
Overall,
our
findings
suggest
responses
stimuli
individuals
are
driven
by
representational
mechanisms
functional
also
adult
brain.
individuals,
information
referents
might
be
backprojected
areas,
from
cortex,
support
predictions,
imagery,
visuospatial
thinking.
mechanism
preserved
and,
combined
with
increased
excitability
drive
strong
stimuli.
Язык: Английский
Semantic representations in the visual cortex of blind and sighted humans
Małgorzata Paczyńska,
Marta Urbaniak,
Marta Dębecka
и другие.
Опубликована: Апрель 17, 2025
In
blind
humans,
the
“visual”
cortex
responds
to
linguistic
stimuli,
such
as
words
and
sentences.
This
is
sometimes
taken
evidence
that
this
brain
region
supports
starkly
different
computations
in
sighted
individuals.
Here,
we
challenge
view
show
that,
during
word
processing,
visual
areas
these
two
populations
represent
same
semantic
dimension
–
knowledge
about
physical
properties
of
referents.
Using
analysis
fMRI
activation
patterns,
found
both
congenitally
participants
represented
differences
between
individual
words.
groups,
patterns
for
reflected
physical,
but
not
conceptual
similarity
Furthermore,
between-group
correlations
were
comparable
within-group
correlations.
Finally,
groups
showed
greatest
“representational
connectivity”
occipitotemporal
areas.
Overall,
our
findings
suggest
responses
stimuli
individuals
are
driven
by
representational
mechanisms
functional
also
adult
brain.
individuals,
information
referents
might
be
backprojected
areas,
from
cortex,
support
predictions,
imagery,
visuospatial
thinking.
mechanism
preserved
and,
combined
with
increased
excitability
drive
strong
stimuli.
Язык: Английский
Vision matters for shape representation: Evidence from sculpturing and drawing in the blind
Cortex,
Год журнала:
2024,
Номер
174, С. 241 - 255
Опубликована: Март 19, 2024
Язык: Английский
Two brain systems for the perception of geometric shapes
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Март 14, 2024
The
perception
and
production
of
regular
geometric
shapes
is
a
characteristic
trait
human
cultures
since
prehistory,
whose
neural
mechanisms
are
unknown.
Behavioral
studies
suggest
that
humans
attuned
to
discrete
regularities
such
as
symmetries
parallelism,
rely
on
their
combinations
encode
in
compressed
form.
To
identify
the
relevant
brain
systems
dynamics,
we
collected
functional
MRI
magnetoencephalography
data
both
adults
six-year-olds
during
simple
hexagons,
triangles
quadrilaterals.
results
revealed
shapes,
relative
other
visual
categories,
induce
hypoactivation
ventral
areas
an
overactivation
intraparietal
inferior
temporal
regions
also
involved
mathematical
processing,
activation
modulated
by
regularity.
While
convolutional
networks
captured
early
activity
evoked
they
failed
account
for
subsequent
dorsal
parietal
prefrontal
signals,
which
could
only
be
features
or
more
advanced
transformer
models
vision.
We
propose
abstract
engages
additional
symbolic
mode
perception.
Язык: Английский
Widespread neural reorganization related to expertise in reading visual Braille
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Май 8, 2024
Abstract
Shape
processing
is
crucial
for
visual
object
understanding.
Visual
reading
seems
to
be
attuned
it,
as
most
scripts
share
similar
features
like
line
junctions
and
shape
cues.
Here
we
investigate
the
effect
of
expertise
in
Braille,
a
script
developed
touch
that
does
not
typical
explicit
information
other
alphabets.
We
compared
Braille
readers
naïve
control
group
found
individually
localized
Word
Form
Area
(VWFA)
was
selectively
activated
when
scrambled
only
expert
readers.
Multivariate
analyses
showed
linguistic
properties
can
decoded
from
Latin
both
groups
Yet,
cross-scripts
generalization
failed
reveal
common
representations
across
experts,
suggesting
VWFA
experts
contains
interdigitated
rather
than
joint
scripts.
Primary
cortex,
shape-selective
areas
(Lateral
Occipital
areas,
LO),
(left
Posterior
Temporal
area,
l-PosTemp)
multivariate
profiles
VWFA,
but
with
aligned
representation
left
area
only.
conclude
status
script,
low-level
line-junctions
properties,
play
major
role
how
system,
particular,
shows
preference
Significance
statement
What
drives
sensitivity
cortex
written
words?
show
readers,
(VWFA),
commonly
thought
integrate
into
words,
responds
without
Words,
regardless
presence
or
absence
lines,
are
processed
their
content,
which
happens
script-specific
manner.
Additionally,
observe
several
key
regions
involved
vision
(V1,
more
script-invariant
language
(l-PosTemp).
network
specialise
Язык: Английский
The Multisensory and Multidimensional Nature of Object Representation.
Journal of Neurophysiology,
Год журнала:
2024,
Номер
unknown
Опубликована: Июнь 12, 2024
Recent
fMRI
experiments
revealed
similar
neural
representations
across
different
types
of
2D
visual
stimuli;
however,
real
3D
objects
affording
action
differentially
affect
activation
and
behavioral
results
relative
to
objects.
Recruitment
multiple
sensory
regions
during
unisensory
(visual,
haptic,
auditory)
object
shape
tasks
suggests
that
representation
may
be
modality
invariant.
This
mini
review
explores
the
overlapping
involved
in
representation,
2D,
3D,
visual,
haptic
experiments.
Язык: Английский
Mirror-invariance is not exclusively visual but extends to touch
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Дек. 28, 2024
Mirror-invariance
enables
recognition
of
mirrored
objects
as
identical.
During
reading
acquisition,
sighted
readers
must
overcome
this
innate
bias
to
distinguish
between
mirror-inverted
letters
('d'
vs.
'b').
Congenitally
blind
individuals
seem
mirror-invariance
for
Braille
letters,
too.
Here,
we
investigated
across
modalities
and
its
modulation
based
on
the
objects'
familiarity.
subjects
participated
in
same-different
judgment
tasks
using
tactile
(blind
blindfolded
subjects)
visual
(sighted
modalities.
Stimuli
included
pairs
(Braille
Latin)
familiar
non-linguistic
stimuli:
geometric
figures
everyday
objects,
presented
identical
('p'/'p'),
mirror
('p'/'q'),
different
('p'/'z')
conditions.
In
modality,
no
group
differences
were
found
shape
stimuli.
orientation-based
task,
higher
expertise
haptic
rather
than
was
observed
group.
Sighted
participants
exhibit
difficulties
when
judging
Latin
those
orientation
(signature
breaking
invariance),
comparison
blind,
who
had
Results
suggest
that
is
modality-independent.
Язык: Английский