okay so what's a plexus yeah i'm not
talking about a pink
drink i'm talking about a plexus in your
spinal cord
now we're talking about the brachial
plexus the plexus is a network
or a tingle might be a better word of
lymphatic vessels
nerves and veins so when you hear
healthcare providers refer to the
brachial plexus
that's what they're talking about it's a
network or a tangle
of lymphatic vessels nerves or veins
okay now csf cerebral spinal fluid is
constantly being produced by the cord
plexuses inside the ventricles of the
brain
now we've got a great picture for you
here
and so always if someone includes a
picture take the time to really
look at it and study it so what i want
you to do now
is to pause and look for the chloride
plexus
you don't have to pause the video if you
can find it right now but i want to make
sure you put your
finger on the chloride plexus before we
go on
okay so link the concept of cerebral
spinal fluid
and chloride plexus together because
that's where the production of cerebral
spinal fluid happens
now most of the cerebral spinal fluid
will drain from the ventricles
into the what sweet the subarachnoid
space
around the brain and the spinal cord so
take your finger
find the subarachnoid space and i want
you to trace it
all the way around the brain down to the
spinal cord
so you're really using your fingers as a
way to
learn and imprint information into your
own brains
because anytime you use motion or touch
you're really helping your brain encode
so find the chloride plexus boom
find the subarachnoid space trace it all
the way around there
so we know that the csf is produced
in the chloride plexus inside the
ventricles of the brain
and most of the cerebral spinal fluid
drains from the ventricles
into the subarachnoid space around the
brain and spinal cord
now you have a real picture in your mind
of what that looks like
when we're talking about the
subarachnoid space
that's in between those meninges that
we've talked about remember
pia arachnoid dura you've got it good
so sub arachnoid is just below
sub the arachnoid layer now a little bit
of it flows down that
central canal the spinal cord can you
picture in your mind where that is
yeah that was that hole dead in the
center or canal
dead in the center of the spinal cord in
the gray matter
now it constantly drains the dural
sinuses through the arachnoid villi
also so predominantly subarachnoid space
is going to get the most of it
but a little bit's going to go down the
central canal and it's also
through the arachnoid villi we talk
about cerebral spinal
fluid and the spinal cord a layer of
cerebral spinal fluid protects the
spinal cord remember we talked about
that you had the cerebral spinal fluid
and the fat but i want to hit it one
more time
the cerebral spinal fluid protects the
spinal cord in the subarachnoid space
that helps it from getting damaged by
coming into contact with that interior
side of the column
okay so that's acts as a cushion just
like the fat does the cerebral spinal
fluid
also acts as a shock absorber and a
cushion
now let's take a look at the peripheral
nervous system
remember the central nervous system goes
right down the dead center of your body
the peripheral nervous system are those
nerves that connect the spinal cord
to the rest of the parts of your body
it's called the peripheral
nervous system now we use that word a
lot like peripheral iv
right versus a central line so think of
the nerves
peripheral nervous system is everything
coming off the spinal cord
out to the rest of the parts of your
body okay so we'll talk about peripheral
nervous system
medications versus cns medications
you'll see us use these terms
peripheral nervous system and central
nervous system a lot
in healthcare
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you