Definition of Spinal
Spi´nal
a.
1.
(Anat.)
Of
,
pertaining
to
,
or
in
the
region
of
,
the
backbone
,
or
vertebral
column
;
rachidian
;
vertebral
.
2.
Of
or
pertaining
to
a
spine
or
spines
.
Spinal accessory nerves
the
eleventh
pair
of
cranial
nerves
in
the
higher
vertebrates
.
They
originate
from
the
spinal
cord
and
pass
forward
into
the
skull
,
from
which
they
emerge
in
company
with
the
pneumogastrics
.
Spinal column
the
backbone
,
or
connected
series
or
vertebræ
which
forms
the
axis
of
the
vertebrate
skeleton
;
the
spine
;
rachis
;
vertebral
column
.
Spinal cord
the
great
nervous
cord
extending
backward
from
the
brain
along
the
dorsal
side
of
the
spinal
column
of
a
vertebrate
animal
,
and
usually
terminating
in
a
threadlike
appendage
called
the
filum terminale
;
the
spinal
,
or
vertebral
,
marrow
;
the
myelon
.
The
nervous
tissue
consists
of
nerve
fibers
and
nerve
cells
,
the
latter
being
confined
to
the
so-called
gray matter
of
the
central
portions
of
the
cord
,
while
the
peripheral
white matter
is
composed
of
nerve
fibers
only
.
The
center
of
the
cord
is
traversed
by
a
slender
canal
connecting
with
the
ventricles
of
the
brain
.
Related Words
back
,
backbone
,
rachis
,
spinal
column
,
spine
,
vertebral
column
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