Journal of Applied Physiology,
Journal Year:
2023,
Volume and Issue:
135(2), P. 475 - 484
Published: July 20, 2023
We
tested
the
hypothesis
that
ingestion
of
cocoa
flavanols
would
improve
cognition
during
acute
hypoxia
equivalent
to
5,500
m
altitude
(partial
pressure
end-tidal
oxygen
=
45
mmHg).
Using
placebo-controlled
double-blind
trials,
12
participants
ingested
15
mg·kg-1
90
min
before
completing
cognitive
tasks
normoxia
and
either
poikilocapnic
or
isocapnic
carbon
dioxide
uncontrolled
maintained
at
baseline
value,
respectively).
Cerebral
oxygenation
was
measured
using
functional
near-infrared
spectroscopy.
Overall
impaired
by
(main
effect
hypoxia,
P
0.008).
Cocoa
improved
a
measure
overall
performance
4%
compared
with
placebo
(effect
flavanols,
0.033)
indicating
change
in
from
"low
average"
"average."
The
hypoxia-induced
decrease
cerebral
two-fold
greater
than
0.005).
Subjective
fatigue
increased
900%
0.004).
0.001)
but
not
(mean
improvement
1%;
0.72).
Reaction
time
8%
further
11%
0.01).
Our
findings
are
first
show
flavanol-mediated
improvements
mood
persist
severe
deprivation,
conferring
neuroprotective
effect.NEW
&
NOTEWORTHY
for
exert
hypoxia.
Following
flavanol
ingestion,
we
observed
cognition,
oxygenation,
subjective
did
suggesting
possible
interaction
dioxide.
Technium BioChemMed,
Journal Year:
2022,
Volume and Issue:
3(2), P. 55 - 72
Published: May 30, 2022
Low
oxygen
breathing
has
been
the
subject
of
considerable
research
in
recent
years.
The
present
review
aims
to
determine
physiological
and
neuropsychological
benefits
low-oxygen
training.
Specifically,
we
explored
ways
low
affects
hormones,
neurotransmitters
growth
factors
responsible
for
neuroplasticity,
higher
cognition
positive
emotions.
In
addition,
shed
light
on
importance
hypoxia
expand
conscious
experience.
Furthermore,
investigate
role
digital
technologies
assisting
hypoxic
results
showed
that
deprivation,
under
certain
circumstances,
beneficial
effects
cognition,
mood
consciousness.
It
was
observed
an
increase
factors,
which
are
tissue
repair
regeneration.
Hypoxia
also
found
stimulate
hormones
pleasure,
happiness,
pain
tolerance,
socialization
relaxation.
Interestingly,
people
conditions
more
likely
have
transcendental
experiences
-even
develop
‘superhuman’
abilities.
Digital
facilitate
safe
implementation
training
enabling
users
take
control
a
powerful
tool,
is
none
other
than
breathing.
Metacognition
can
help
consciously
safely
manipulate
their
by
moving
themselves
away
from
comfort
zone
exploring
new
pathways
rewire
brains
plumb
depths
physical,
cognitive,
emotional
spiritual
potential.
Ergonomics,
Journal Year:
2023,
Volume and Issue:
66(12), P. 2148 - 2164
Published: March 14, 2023
This
study
investigates
how
cognitive
performance
is
affected
by
the
combination
of
two
stressors
that
are
operationally
relevant
for
helicopter
pilots:
heat
load
and
hypobaric
hypoxia.
Fifteen
participants
were
exposed
to
(1)
no
stressors,
(2)
load,
(3)
hypoxia,
(4)
combined
Hypobaric
hypoxia
(13,000
ft)
was
achieved
in
a
chamber.
Heat
induced
increasing
ambient
temperature
∼28
°C.
Cognitive
measured
using
multitasks,
vigilance
task.
Subjective
physiological
data
(oxygen
saturation,
heart
rate,
core-
skin
temperature)
also
collected.
Mainly
caused
decline.
can
be
explained
high
subjective
increased
temperature,
which
takes
away
resources
from
tasks.
Only
arithmetic
subtask
sensitive
whereby
further
decline
addition
load.Practitioner
summary:
Little
known
about
multiple
environmental
interact.
effects
on
performance.
An
additive
effect
found
task,
may
attributed
independent
underlying
mechanisms.
Frontiers in Physiology,
Journal Year:
2022,
Volume and Issue:
13
Published: Dec. 12, 2022
In
the
course
of
their
missions
or
training,
alpinists,
but
also
mountain
combat
forces
and
security
services,
professional
miners,
aircrew,
aircraft
glider
pilots
helicopter
crews
are
regularly
exposed
to
altitude
without
oxygen
supplementation.
At
altitude,
humans
systemic
environmental
hypoxia
induced
by
decrease
in
barometric
pressure
(<1,013
hPa)
which
decreases
inspired
partial
(PIO
2
),
while
fraction
is
constant
(equal
approximately
20.9%).
Effects
on
occur
gradually
depend
duration
exposure
level.
From
1,500
m
(response
threshold),
several
adaptive
responses
offset
effects
hypoxia,
involving
respiratory
cardiovascular
systems,
transport
capacity
blood.
Fatigue
cognitive
sensory
disorders
usually
observed
from
2,500
(threshold
prolonged
hypoxia).
Above
3,500
(the
threshold
for
disorders),
not
completely
compensated
maladaptive
individuals
develop
headache
acute
illness
[Acute
Mountain
Sickness
(AMS)].
The
magnitude
varies
considerably
between
different
physiological
systems
exhibits
significant
inter-individual
variability.
addition
comorbidities,
factors
vulnerability
still
little
known.
They
can
be
constitutive
(genetic)
circumstantial
(sleep
deprivation,
fatigue,
speed
ascent.).
particular,
sleep
loss,
a
condition
that
often
encountered
real-life
settings,
could
have
an
impact
hypoxia.
this
review,
we
report
current
state
knowledge
loss
humans,
with
aim
identifying
possible
consequences
AMS
risk
cognition,
as
well
value
behavioral
non-pharmacological
countermeasures.
Frontiers in Neurology,
Journal Year:
2023,
Volume and Issue:
13
Published: Jan. 26, 2023
Objective
To
analyze
the
brain
imaging
features
of
high-altitude
cerebral
edema
(HACE)
using
computed
tomography
(CT)
and
multi-sequence
magnetic
resonance
(MRI)
to
explore
its
injury
characteristics.
Materials
methods
We
selected
30
patients
with
HACE
diagnosed
between
January
2012
August
2022
as
experimental
group
60
dizziness
on
traveling
from
plain
plateau
or
lower
altitude
higher
in
a
short
period
time
control
group.
collected
general
clinical
data
classified
it
according
symptoms.
In
both
groups,
we
then
performed
head
CT
MRI
(T1WI,
T2WI,
FLAIR,
DWI).
Among
them,
nine
were
also
scanned
susceptibility-weighted
(SWI).
Finally,
analyzed
images.
Results
According
symptoms,
divided
cases
into
12
mild
18
severe
cases.
There
was
no
significant
difference
sex,
age,
leukocyte,
neutrophil,
glucose
content
HACE.
The
sensitivity
specificity
diagnosis
100
100%,
respectively,
while
23.3
respectively.
distribution
range
deep
juxtacortical
white
matter
significantly
larger
than
(
p
<
0.001).
corpus
callosum
that
=
ADC
value
splenium
0.049).
HACE,
signal
intensity
DWI
sequence
conventional
sequences
FLAIR)
0.008,
0.025,
respectively).
seven
showed
bilateral
corticospinal
tract
at
thalamic
level,
SWI
microbleeds
(CMBs)
five
cases,
especially
callosum.
Conclusions
has
more
advantages
evaluation
sequence.
is
extensive,
callosum,
some
CMBs
may
appear.
Journal of Applied Physiology,
Journal Year:
2023,
Volume and Issue:
135(2), P. 475 - 484
Published: July 20, 2023
We
tested
the
hypothesis
that
ingestion
of
cocoa
flavanols
would
improve
cognition
during
acute
hypoxia
equivalent
to
5,500
m
altitude
(partial
pressure
end-tidal
oxygen
=
45
mmHg).
Using
placebo-controlled
double-blind
trials,
12
participants
ingested
15
mg·kg-1
90
min
before
completing
cognitive
tasks
normoxia
and
either
poikilocapnic
or
isocapnic
carbon
dioxide
uncontrolled
maintained
at
baseline
value,
respectively).
Cerebral
oxygenation
was
measured
using
functional
near-infrared
spectroscopy.
Overall
impaired
by
(main
effect
hypoxia,
P
0.008).
Cocoa
improved
a
measure
overall
performance
4%
compared
with
placebo
(effect
flavanols,
0.033)
indicating
change
in
from
"low
average"
"average."
The
hypoxia-induced
decrease
cerebral
two-fold
greater
than
0.005).
Subjective
fatigue
increased
900%
0.004).
0.001)
but
not
(mean
improvement
1%;
0.72).
Reaction
time
8%
further
11%
0.01).
Our
findings
are
first
show
flavanol-mediated
improvements
mood
persist
severe
deprivation,
conferring
neuroprotective
effect.NEW
&
NOTEWORTHY
for
exert
hypoxia.
Following
flavanol
ingestion,
we
observed
cognition,
oxygenation,
subjective
did
suggesting
possible
interaction
dioxide.