Spinal
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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