Frontiers in Neural Circuits,
Год журнала:
2025,
Номер
19
Опубликована: Март 21, 2025
Descending
neural
pathways
to
the
spinal
cord
plays
vital
roles
in
motor
control.
They
are
often
damaged
by
brain
injuries
such
as
stroke
and
trauma,
which
lead
severe
impairments.
Due
limited
capacity
for
regeneration
of
circuits
adult
central
nervous
system,
currently
no
essential
treatments
available
complete
recovery.
Notably,
accumulating
evidence
shows
that
residual
descending
dynamically
reorganized
after
injury
contribute
Furthermore,
recent
technological
advances
cell-type
classification
manipulation
have
highlighted
structural
functional
diversity
these
pathways.
Here,
we
focus
on
three
major
pathways,
namely,
corticospinal
tract
from
cerebral
cortex,
rubrospinal
red
nucleus,
reticulospinal
reticular
formation,
summarize
current
knowledge
their
structures
functions,
especially
rodent
models
(mice
rats).
We
then
review
discuss
process
patterns
reorganization
induced
following
injury,
compensate
lost
connections
Understanding
basic
properties
each
pathway
principles
induction
outcome
rewired
will
provide
therapeutic
insights
enhance
interactive
rewiring
multiple
The
supraspinal
descending
pain
modulatory
system
(DPMS)
shapes
perception
via
monoaminergic
modulation
of
sensory
information
in
the
spinal
cord.
However,
role
and
synaptic
mechanisms
noradrenergic
signaling
remain
unclear.
Here,
we
establish
that
neurons
locus
coeruleus
(LC)
are
essential
for
opioid
antinociception.
While
much
previous
work
has
emphasized
serotonergic
pathways,
find
antinociception
is
primarily
driven
by
excitatory
output
from
ventrolateral
periaqueductal
gray
(vlPAG)
to
LC.
Furthermore,
identify
a
previously
unknown
opioid-sensitive
inhibitory
input
rostroventromedial
medulla
(RVM),
suppression
which
disinhibits
LC
drive
We
describe
pain-related
activity
throughout
this
circuit
report
presence
prominent
bifurcating
outputs
vlPAG
RVM.
Our
findings
substantially
revise
current
models
DPMS
antinociceptive
pathway
may
contribute
multiple
forms
modulation.
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 7, 2025
Neuromodulatory
signaling
is
poised
to
serve
as
a
neural
mechanism
for
gain
control,
acting
crucial
tuning
factor
influence
neuronal
activity
by
dynamically
shaping
excitatory
and
inhibitory
fast
neurotransmission.
The
endocannabinoid
(eCB)
system,
the
most
widely
expressed
neuromodulatory
system
in
mammalian
brain,
known
filter
inputs
through
retrograde,
pre-synaptic
action.
However,
whether
eCBs
exert
retrograde
control
ultimately
facilitate
reward-seeking
behaviors
freely
moving
mammals
not
established.
Using
suite
of
vivo
physiological,
imaging,
genetic
machine
learning-based
approaches,
we
report
fundamental
role
controlling
behavioral
engagement
behavior
defined
thalamo-striatal
circuit.
Frontiers in Neural Circuits,
Год журнала:
2025,
Номер
19
Опубликована: Март 21, 2025
Descending
neural
pathways
to
the
spinal
cord
plays
vital
roles
in
motor
control.
They
are
often
damaged
by
brain
injuries
such
as
stroke
and
trauma,
which
lead
severe
impairments.
Due
limited
capacity
for
regeneration
of
circuits
adult
central
nervous
system,
currently
no
essential
treatments
available
complete
recovery.
Notably,
accumulating
evidence
shows
that
residual
descending
dynamically
reorganized
after
injury
contribute
Furthermore,
recent
technological
advances
cell-type
classification
manipulation
have
highlighted
structural
functional
diversity
these
pathways.
Here,
we
focus
on
three
major
pathways,
namely,
corticospinal
tract
from
cerebral
cortex,
rubrospinal
red
nucleus,
reticulospinal
reticular
formation,
summarize
current
knowledge
their
structures
functions,
especially
rodent
models
(mice
rats).
We
then
review
discuss
process
patterns
reorganization
induced
following
injury,
compensate
lost
connections
Understanding
basic
properties
each
pathway
principles
induction
outcome
rewired
will
provide
therapeutic
insights
enhance
interactive
rewiring
multiple