Full transcript
0:00so in order for the nervous system to
0:03function it needs to be able to
0:05communicate how it does that is from one
0:08nervous cell to the other so looking at
0:10this diagram here we can see two of the
0:13components uh the cell itself is called
0:16a neuron and the way that it
0:18communicates is through these tree-like
0:21uh finger-like to meet the projections
0:24called dendrites these dendrites allow
0:27for the neuron to be able to move
0:29through and again allow that
0:31communication with other cells that
0:33gives us that sense of touch feeling
0:36movement all of that that's sent from
0:39the central nervous system you also have
0:41what's called a nucleus
0:44and remember within each cell the
0:46nucleus holds the DNA the genetic
0:49material of the cell tells us what kind
0:52of cell it's going to be if this cell
0:54has to regenerate itself it already
0:57knows that it's a cell that belongs to
1:00the central nervous system
1:02also each cell has what's called an axon
1:06the axon is here it's kind of a part of
1:09the tail
1:10it stores what's called
1:12neurotransmitters
1:14it's considered a nerve fiber and it
1:18transmits information to muscles and
1:21glands so because it is a
1:23neurotransmitter this is one of the main
1:25functions uh when we're talking about
1:27pain in the body and blocking that pain
1:31essentially when we're taking pain
1:32medication for areas in our body uh
1:36really what's happening is that pain
1:38never really truthfully goes away until
1:40the body heals however we do have the
1:43ability to block what is communicated
1:46from our central nervous system
1:47throughout a peripheral nervous system
1:49and so we do that by blocking the
1:52communication and the neurotransmitters
1:55so again that pain is already it's there
1:57it hasn't gone anywhere but because
1:59we're taking medication it blocks that
2:02communication uh usually medication
2:04lasts about six to eight hours about
2:06that seventh hour and you might start
2:08feel start feeling that pain work its
2:11way back uh what it is is the pain has
2:13never left it's always been there but
2:16the medication is wearing off and so the
2:18neurotransmitters within the axon have
2:21the ability to speak within the central
2:24nervous system again which causes you to
2:26feel that pain or discomfort also within
2:29the structure you have what's called a
2:31myelin sheath and the term sheath refers
2:34to the protective cover that wraps
2:36around the axons it insulates the neuron
2:40and controls the number of electrical
2:43signals that are being transmitted at
2:45one time
2:46last portion here right at the end of
2:49the dendrites you have what's called
2:50synops
2:52and with the synops this is a structure
2:55that permits a neuron to pass an
2:57electrical or chemical signal to another
3:00neuron
3:01so again the ability to be able to speak
3:04pain to another cell we can block that
3:07that's done through the synops