The relationship between alpha power and heart rate variability commonly seen in various mental states
PLoS ONE,
Journal Year:
2024,
Volume and Issue:
19(3), P. e0298961 - e0298961
Published: March 1, 2024
The
extensive
exploration
of
the
correlation
between
electroencephalogram
(EEG)
and
heart
rate
variability
(HRV)
has
yielded
inconsistent
outcomes,
largely
attributable
to
variations
in
tasks
employed
studies.
direct
relationship
EEG
HRV
is
further
complicated
by
alpha
power,
which
susceptible
influences
such
as
mental
fatigue
sleepiness.
This
research
endeavors
examine
brain-heart
interplay
typically
observed
during
periods
music
listening
rest.
In
an
effort
mitigate
indirect
effects
states
on
subjective
sleepiness
were
measured
rest,
while
emotional
valence
arousal
evaluated
listening.
Partial
analyses
unveiled
positive
associations
occipital
alpha2
power
(10–12
Hz)
nHF,
indicator
parasympathetic
activity,
under
both
rest
conditions.
These
findings
underscore
interactions
that
persist
even
after
other
variables
have
been
accounted
for.
Language: Английский
Electroencephalographic Biomarkers of Relaxation: A Systematic Review and Meta-analysis
bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2024,
Volume and Issue:
unknown
Published: March 28, 2024
Abstract
The
human
electroencephalogram
(EEG)
is
composed
of
synchronous
oscillations
within
characteristic
frequency
bands,
including
8–13
Hz
alpha
that
often
appear
during
relaxation.
Relaxation
critical
for
physical
and
mental
health,
but
the
extent
to
which
various
EEG
components
reflect
relaxation
remains
uncertain.
This
systematic
review
meta-analysis
investigated
associations
between
concurrently
measured
reference
indices
in
healthy
adults.
A
comprehensive
database
search
screening
using
preset
criteria
identified
38
studies
involving
1,120
participants
published
January
1940
2022
qualitative
synthesis.
These
used
measures
such
as
electrocardiographic
related
parasympathetic
nervous
system
activity
introspective
obtained
through
questionnaires.
Risks
bias
were
evaluated
following
risk
assessment
tool
nonrandomized
studies.
23
a
random-effects
model
revealed
positive
correlations
index
power
at
central
channels
(Fisher’s
z
-transformed
correlation
coefficient
[95%
confidence
interval]:
0.23
[0.10–0.36])
frontal
(0.16
[0.02–0.31]).
was
significantly
higher
channel
compared
with
other
channels.
No
significant
detected
frequencies
or
causal
relationships
warrant
further
study.
Language: Английский
Alpha-band Brain Dynamics and Temporal Processing: An Introduction to the Special Focus
Journal of Cognitive Neuroscience,
Journal Year:
2024,
Volume and Issue:
36(4), P. 567 - 571
Published: Jan. 1, 2024
Abstract
For
decades,
the
intriguing
connection
between
human
alpha
rhythm
(an
8-
to
13-Hz
oscillation
maximal
over
posterior
cortex)
and
temporal
processes
in
perception
has
furnished
a
rich
landscape
of
proposals.
The
past
decade,
however,
seen
surge
interest
topic,
bringing
new
theoretical,
analytic,
methodological
developments
alongside
fresh
controversies.
This
Special
Focus
on
alpha-band
dynamics
processing
provides
an
up-to-date
snapshot
playing
field,
with
contributions
from
leading
researchers
field
spanning
original
perspectives,
evidence,
comprehensive
reviews
meta-analyses,
as
well
discussion
ongoing
controversies
paths
forward.
We
hope
that
perspectives
captured
here
will
help
catalyze
future
research
shape
pathways
toward
theoretically
grounded
mechanistic
account
link
properties
perception.
Language: Английский
The Influence of Alpha Frequency on Temporal Binding across the Senses: Response to the Special Focus
Journal of Cognitive Neuroscience,
Journal Year:
2024,
Volume and Issue:
36(4), P. 730 - 733
Published: Jan. 1, 2024
Abstract
The
papers
collected
in
this
Special
Focus,
prompted
by
S.
Buergers
and
U.
Noppeney
[The
role
of
alpha
oscillations
temporal
binding
within
across
the
senses.
Nature
Human
Behaviour,
6,
732–742,
2022],
have
raised
several
interesting
ideas,
arguments,
empirical
results
relating
to
resolution
hypothesis.
Here
we
briefly
respond
these,
process
emphasize
four
challenges
for
future
research:
defining
scope
limitation
hypothesis;
developing
experimental
paradigms
study
designs
that
rigorously
test
its
tenets;
decomposing
scalp-level
signal
isolating
underlying
neural
circuits;
bringing
uniformity
current
diversity
analysis
statistical
methods.
Addressing
these
will
facilitate
progression
from
merely
correlating
frequency
with
various
perceptual
phenomena
establishing
whether
(if
so)
how
influences
sensory
integration
segregation.
Language: Английский
Visual processing by hierarchical and dynamic multiplexing
Published: Nov. 24, 2023
The
complexity
of
natural
environments
requires
highly
flexible
mechanisms
for
adaptive
processing.
Furthermore,
the
processing
single
and
multiple
stimuli
is
strongly
context
goal
dependent.
large
repertoire
frequencies
waveforms
what
commonly
referred
to
as
neuronal
oscillations
could
be
an
ideal
candidate
implementing
such
flexibility
in
neural
systems.
Here
we
present
a
framework
which
dynamic
multiplexing
phase
coding
schemes
underlie
structure
attention-guided
complex
visual
scenes.
Importantly,
suggest
that
fluctuations
excitability
vary
rapidly
terms
magnitude,
frequency
wave-form
over
time,
i.e.
they
are
not
necessarily
sustained
oscillations.
We
propose
different
elements
object
should
processed
within
cycle
(or
burst)
alpha
band
activity
(7-14Hz).
This
allows
formation
coherent
representations
while
simultaneously
separating
objects
across
cycles.
Each
element
(e.g.
eyes
or
ears
cat)
would
still
separately
time
-
expressed
gamma
bursts
(>
30Hz)
along
phase.
Since
capacity
per
limited,
inverse
relationship
between
resolution
size
attentional
spotlight
ensures
independence
proposed
mechanism
from
absolute
complexity.
specific
wave-shape
respective
involved
depend
on
nature
cognitive
demands.
Additionally,
further
organized
slower
delta
theta).
Alternatively,
saccades
drive
reset
this
slow
fluctuations.
Complex
scene
exploration,
involving
covert
attention
eye
movements,
therefore
associated
with
changes,
both
lower
range.
embraces
idea
hierarchical
organization
processing,
independent
temporal
dynamics
environment.
Language: Английский
Visual Processing by Hierarchical and Dynamic Multiplexing
eNeuro,
Journal Year:
2024,
Volume and Issue:
11(11), P. ENEURO.0282 - 24.2024
Published: Nov. 1, 2024
The
complexity
of
natural
environments
requires
highly
flexible
mechanisms
for
adaptive
processing
single
and
multiple
stimuli.
Neuronal
oscillations
could
be
an
ideal
candidate
implementing
such
flexibility
in
neural
systems.
Here,
we
present
a
framework
structuring
attention-guided
complex
visual
scenes
humans,
based
on
multiplexing
phase
coding
schemes.
Importantly,
suggest
that
the
dynamic
fluctuations
excitability
vary
rapidly
terms
magnitude,
frequency
wave-form
over
time,
i.e.,
they
are
not
necessarily
sinusoidal
or
sustained
oscillations.
Different
elements
objects
would
processed
within
cycle
(burst)
alpha
activity
(7–14
Hz),
allowing
formation
coherent
object
representations
while
separating
across
cycles.
Each
element
separately
time—expressed
as
different
gamma
band
bursts
(>30
Hz)—along
phase.
Since
capacity
per
is
limited,
inverse
relationship
between
resolution
size
attentional
spotlight
ensures
independence
proposed
mechanism
from
absolute
complexity.
Frequency
wave-shape
those
depend
nature
cognitive
demands.
Multiple
further
organized
along
slower
(e.g.,
theta),
potentially
driven
by
saccades.
Complex
scene
processing,
involving
covert
attention
eye
movements,
therefore
associated
with
changes
lower
range.
This
embraces
idea
hierarchical
organization
independent
environmental
temporal
dynamics.
Language: Английский