medullated
a . 有髓的
有髓的
medullated adj 1 : (
of neurons )
covered with a layer of myelin [
synonym :
{
myelinated }, {
medullated }] [
ant : {
unmyelinated }]
Medullated \
Me *
dul "
la *
ted \,
a . (
Anat .)
Furnished with a medulla or marrow ,
or with a medullary sheath ;
as ,
a medullated nerve fiber .
[
1913 Webster ]
nerve \
nerve \ (
n [~
e ]
rv ),
n . [
OE .
nerfe ,
F .
nerf ,
L .
nervus ,
akin to Gr .
ney ^
ron sinew ,
nerve ;
cf .
neyra `
string ,
bowstring ;
perh .
akin to E .
needle .
Cf . {
Neuralgia }.]
1 . (
Anat .)
One of the whitish and elastic bundles of fibers ,
with the accompanying tissues ,
which transmit nervous impulses between nerve centers and various parts of the animal body .
[
1913 Webster ]
Note :
An ordinary nerve is made up of several bundles of nerve fibers ,
each bundle inclosed in a special sheath (
the perineurium )
and all bound together in a connective tissue sheath and framework (
the epineurium )
containing blood vessels and lymphatics .
[
1913 Webster ]
2 .
A sinew or a tendon . --
Pope .
[
1913 Webster ]
3 .
Physical force or steadiness ;
muscular power and control ;
constitutional vigor .
[
1913 Webster ]
he led me on to mightiest deeds ,
Above the nerve of mortal arm . --
Milton .
[
1913 Webster ]
4 .
Steadiness and firmness of mind ;
self -
command in personal danger ,
or under suffering ;
unshaken courage and endurance ;
coolness ;
pluck ;
resolution .
[
1913 Webster ]
5 .
Audacity ;
assurance . [
Slang ]
[
1913 Webster ]
6 . (
Bot .)
One of the principal fibrovascular bundles or ribs of a leaf ,
especially when these extend straight from the base or the midrib of the leaf .
[
1913 Webster ]
7 . (
Zool .)
One of the nervures ,
or veins ,
in the wings of insects .
[
1913 Webster ]
{
Nerve cell } (
Anat .),
a neuron ,
one of the nucleated cells with which nerve fibers are connected ;
a {
ganglion cell }
is one type of nerve cell .
{
Nerve fiber } (
Anat .),
one of the fibers of which nerves are made up .
These fibers are either {
medullated }
or {
nonmedullated }.
In both kinds the essential part is the translucent threadlike axis cylinder which is continuous the whole length of the fiber .
{
Nerve stretching } (
Med .),
the operation of stretching a nerve in order to remedy diseases such as tetanus ,
which are supposed to be influenced by the condition of the nerve or its connections .
[
1913 Webster ]
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