Nature Communications,
Journal Year:
2022,
Volume and Issue:
13(1)
Published: March 22, 2022
Abstract
A
major
debate
about
the
neural
correlates
of
conscious
perception
concerns
its
cortical
organization,
namely,
whether
it
includes
prefrontal
cortex
(PFC),
which
mediates
executive
functions,
or
is
constrained
within
posterior
cortices.
It
has
been
suggested
that
PFC
activity
during
paradigms
investigating
conflated
with
post-perceptual
processes
associated
reporting
contents
consciousness
feedforward
signals
originating
from
exogenous
stimulus
manipulations
and
relayed
via
areas.
We
addressed
this
by
simultaneously
probing
neuronal
populations
in
rhesus
macaque
(Macaca
mulatta)
a
no-report
paradigm,
capable
instigating
internally
generated
transitions
perception,
without
changes
visual
stimulation.
find
feature-selective
neurons
are
modulated
concomitantly
subjective
perceptual
suppression
their
preferred
both
externally
induced
perception.
Importantly,
enables
reliable
single-trial,
population
decoding
contents.
Control
experiments
confirm
significant
contents,
even
when
oculomotor
responses,
used
for
inferring
suppressed.
These
findings
suggest
reliably
reflected
absence
volitional
reports
sensory
input.
Proceedings of the National Academy of Sciences,
Journal Year:
2019,
Volume and Issue:
116(52), P. 26332 - 26342
Published: Dec. 6, 2019
Optogenetics,
which
uses
visible
light
to
control
the
cells
genetically
modified
with
light-gated
ion
channels,
is
a
powerful
tool
for
precise
deconstruction
of
neural
circuitry
neuron-subtype
specificity.
However,
due
limited
tissue
penetration
light,
invasive
craniotomy
and
intracranial
implantation
tethered
optical
fibers
are
usually
required
in
vivo
optogenetic
modulation.
Here
we
report
mechanoluminescent
nanoparticles
that
can
act
as
local
sources
brain
when
triggered
by
brain-penetrant
focused
ultrasound
(FUS)
through
intact
scalp
skull.
Mechanoluminescent
be
delivered
into
blood
circulation
via
i.v.
injection,
recharged
400-nm
photoexcitation
superficial
vessels
during
circulation,
turned
on
FUS
emit
470-nm
repetitively
stimulation.
Unlike
conventional
"outside-in"
approaches
optogenetics
fiber
implantation,
our
method
provides
an
"inside-out"
approach
deliver
nanoscopic
emitters
intrinsic
circulatory
system
switch
them
off
at
any
time
location
interest
without
extravasation
minimally
interface.
Nature Communications,
Journal Year:
2021,
Volume and Issue:
12(1)
Published: July 26, 2021
Abstract
Optogenetic
manipulation
of
neuronal
activity
through
excitatory
and
inhibitory
opsins
has
become
an
indispensable
experimental
strategy
in
neuroscience
research.
For
many
applications
bidirectional
control
allowing
both
excitation
inhibition
the
same
neurons
a
single
experiment
is
desired.
This
requires
low
spectral
overlap
between
opsin,
matched
photocurrent
amplitudes
fixed
expression
ratio.
Moreover,
independent
activation
two
distinct
populations
with
different
optogenetic
actuators
still
challenging
due
to
blue-light
sensitivity
all
opsins.
Here
we
report
BiPOLES,
tool
for
potent
light
wavelengths.
BiPOLES
enables
sensitive,
reliable
dual-color
spiking
silencing
single-
or
two-photon
excitation,
optical
tuning
membrane
voltage,
using
second,
sensitive
opsin.
The
utility
demonstrated
worms,
flies,
mice
ferrets.
Cell,
Journal Year:
2022,
Volume and Issue:
185(4), P. 672 - 689.e23
Published: Feb. 1, 2022
ChRmine,
a
recently
discovered
pump-like
cation-conducting
channelrhodopsin,
exhibits
puzzling
properties
(large
photocurrents,
red-shifted
spectrum,
and
extreme
light
sensitivity)
that
have
created
new
opportunities
in
optogenetics.
ChRmine
its
homologs
function
as
ion
channels
but,
by
primary
sequence,
more
closely
resemble
pump
rhodopsins;
mechanisms
for
passive
channel
conduction
this
family
remained
mysterious.
Here,
we
present
the
2.0
Å
resolution
cryo-EM
structure
of
revealing
architectural
features
atypical
channelrhodopsins:
trimeric
assembly,
short
transmembrane-helix
3,
twisting
extracellular-loop
1,
large
vestibules
within
monomer,
an
opening
at
trimer
interface.
We
applied
to
design
three
proteins
(rsChRmine
hsChRmine,
conferring
further
high-speed
properties,
respectively,
frChRmine,
combining
faster
performance)
suitable
fundamental
neuroscience
opportunities.
These
results
illuminate
gating
channelrhodopsins
point
way
toward
structure-guided
creation
applications
across
biology.