Algorithms,
Journal Year:
2018,
Volume and Issue:
11(5), P. 67 - 67
Published: May 8, 2018
With
the
rapid
increase
in
new
fNIRS
users
employing
commercial
software,
there
is
a
concern
that
many
studies
are
biased
by
suboptimal
processing
methods.
The
purpose
of
this
study
to
provide
visual
reference
showing
effects
different
methods,
help
inform
researchers
setting
up
and
evaluating
pipeline.
We
show
significant
impact
pre-
post-processing
choices
stress
again
how
important
it
combine
data
from
both
hemoglobin
species
order
make
accurate
inferences
about
activation
site.
Neurophotonics,
Journal Year:
2022,
Volume and Issue:
9(S2)
Published: Aug. 30, 2022
This
report
is
the
second
part
of
a
comprehensive
two-part
series
aimed
at
reviewing
an
extensive
and
diverse
toolkit
novel
methods
to
explore
brain
health
function.
While
first
focused
on
neurophotonic
tools
mostly
applicable
animal
studies,
here,
we
highlight
optical
spectroscopy
imaging
relevant
noninvasive
human
studies.
We
outline
current
state-of-the-art
technologies
software
advances,
most
recent
impact
these
neuroscience
clinical
applications,
identify
areas
where
innovation
needed,
provide
outlook
for
future
directions.
Frontiers in Human Neuroscience,
Journal Year:
2017,
Volume and Issue:
11
Published: May 17, 2017
Assessing
the
neural
correlates
of
motor
and
cognitive
processes
under
naturalistic
experimentation
is
challenging
due
to
movement
constraints
traditional
brain
imaging
technologies.
The
recent
advent
portable
technologies
that
are
less
sensitive
motion
artifacts
such
as
Functional
Near
Infrared
Spectroscopy
(fNIRS)
have
been
made
possible
study
function
in
freely-moving
participants.
In
this
paper,
we
describe
a
series
proof-of-concept
experiments
examining
potential
fNIRS
assessing
unconstrained
environments.
We
show
illustrative
applications
for
practicing
sport
(i.e.,
table
tennis),
playing
musical
instrument
piano
violin)
alone
or
duo
performing
daily
activities
many
hours
continuous
monitoring).
Our
results
expand
upon
previous
research
on
feasibility
robustness
monitor
hemodynamic
changes
different
real
life
settings.
believe
these
preliminary
showing
flexibility
measurements
may
contribute
by
inspiring
future
work
field
applied
neuroscience.
Journal of Biomedical Optics,
Journal Year:
2016,
Volume and Issue:
21(9), P. 091307 - 091307
Published: May 11, 2016
Near-infrared
spectroscopy
(NIRS)
measurements
of
cytochrome-c-oxidase
(CCO)
have
the
potential
to
yield
crucial
information
about
cerebral
metabolism
at
patient
bedside.
Developments
in
instrumentation
and
analytical
methods
used
resolve
changes
CCO
led
many
clinical
applications
measurement
since
its
first
demonstration
1977
by
Jöbsis.
There
is
a
substantial
literature
work
on
measures
animal
vitro
studies;
however,
this
review
focuses
translational
studies.
Almost
40
years
from
advent
using
NIRS,
signal
continues
hold
significant
interest
our
understanding
human
brain
health
disease.
We
discuss
methodologies
for
obtaining
NIRS
clinic
studies
neonates
adults.
Biomedical Optics Express,
Journal Year:
2016,
Volume and Issue:
7(8), P. 3078 - 3078
Published: July 22, 2016
Analysis
of
cerebral
hemodynamics
reveals
a
wide
spectrum
oscillations
ranging
from
0.0095
to
2
Hz.While
most
these
can
be
filtered
out
during
analysis
functional
near-infrared
spectroscopy
(fNIRS)
signals
when
estimating
stimulus
evoked
hemodynamic
responses,
around
0.1
Hz
are
an
exception.This
is
due
the
fact
that
they
share
common
spectral
range
with
typical
responses
brain.Here
we
investigate
effect
on
estimation
response
functions
fNIRS
data.Our
results
show
for
expected
~1
µM
in
oxygenated
hemoglobin
concentration
(HbO),
Mayer
wave
amplitude
>
at
reduce
accuracy
estimated
as
quantified
by
3
fold
increase
mean
squared
error
and
decrease
correlation
(R
below
0.78)
compared
true
HRF.These
indicate
serve
objective
metric
HRF
accuracy.In
addition,
investigated
short
separation
regression
recovered
HRF,
found
this
improves
large
present
data.We
suspect
development
other
filtering
strategies
may
provide
even
further
improvement.
Frontiers in Human Neuroscience,
Journal Year:
2018,
Volume and Issue:
11
Published: Jan. 8, 2018
Even
though
research
in
the
field
of
functional
near-infrared
spectroscopy
(fNIRS)
is
being
conducted
for
more
than
20
years,
a
consensus
on
signal
processing
methods
still
lacking.
A
significant
knowledge
gap
exists
between
established
researchers
and
those
newly
entering
field.
One
major
issue
regularly
observed
publications
from
new
this
neglect
possible
contamination
by
hemodynamic
changes
unrelated
to
neurovascular
coupling
(i.e.
scalp
blood
flow
systemic
flow).
This
might
be
due
fact
that
these
use
with
tools
provided
manufacturers
their
devices
without
an
advanced
understanding
performed
steps.
The
aim
present
study
was
investigate
how
different
approaches
(including
excluding
partially
correct
contamination)
affect
results
typical
neuroimaging
fNIRS.
In
particular,
we
evaluated
one
standard
method
commercial
company
compared
it
three
customized
investigated
influence
chosen
statistical
outcome
clinical
data
set
(task-evoked
motor
cortex
activity).
No
short-channels
were
used
therefore
two
types
multi-channel
corrections
based
multiple
long-channels
applied.
choice
had
considerable
study.
While
ignored
fNIRS
signals
task-evoked
physiological
noise
yielded
several
responses
over
whole
head,
significance
findings
disappeared
when
accounting
using
regression.
We
conclude
that,
lacking
possibility
applying
multi-distance
measurements,
adoption
confounding
effect,
yield
realistic
results.
Furthermore,
do
not
recommend
as
having
every
step.
Biomedical Optics Express,
Journal Year:
2017,
Volume and Issue:
8(5), P. 2583 - 2583
Published: April 19, 2017
This
paper
presents
an
investigation
about
the
effects
of
mental
stress
on
prefrontal
cortex
(PFC)
subregions
using
simultaneous
measurement
functional
Near-Infrared
Spectroscopy
(fNIRS)
and
Electroencephalography
(EEG)
signals.
The
aim
is
to
explore
canonical
correlation
analysis
(CCA)
technique
study
relationship
among
bi-modality
signals
in
assessment,
how
we
could
fuse
for
better
accuracy
detection.
Twenty-five
male
healthy
subjects
participated
while
performing
arithmetic
task
under
control
(under
time
pressure
with
negative
feedback)
conditions.
fusion
brain
acquired
by
fNIRS-EEG
was
performed
at
feature-level
CCA
maximizing
inter-subject
covariance
across
modalities.
result
discovered
associations
modalities
estimated
components
responsible
these
associations.
experiment
results
showed
that
experienced
this
cohort
subregion
specific
localized
right
ventrolateral
PFC
subregion.
These
suggest
as
a
suitable
candidate
region
extract
biomarkers
performance
indicators
neurofeedback
training
coping.
Social Cognitive and Affective Neuroscience,
Journal Year:
2020,
Volume and Issue:
16(1-2), P. 93 - 102
Published: June 11, 2020
Conversations
are
an
essential
form
of
communication
in
daily
family
life.
Specific
patterns
caregiver-child
conversations
have
been
linked
to
children's
socio-cognitive
development
and
child-relationship
quality
beyond
the
immediate
environment.
Recently,
interpersonal
neural
synchronization
has
proposed
as
a
mechanism
supporting
conversation.
Here,
we
present
functional
near-infrared
spectroscopy
(fNIRS)
hyperscanning
study
looking
at
temporal
dynamics
synchrony
during
mother-child
Preschoolers
(20
boys
20
girls,
M
age
5;07
years)
their
mothers
(M
36.37
were
tested
simultaneously
with
fNIRS
while
engaging
free
verbal
conversation
lasting
for
4
min.
Neural
(using
wavelet
transform
coherence
analysis)
was
assessed
over
time.
Furthermore,
each
conversational
turn
coded
comprising
turn-taking,
relevance,
contingency
intrusiveness.
Results
from
linear
mixed-effects
modeling
revealed
that
but
not
or
intrusiveness
predicted
discussed
point
out
possible
variables
affecting
parent-child
potential
role
