Video

Transcript

so I’m going to talk about the nervous

system it’s part of a communication

system in the body and there’s two main

communication systems we have the

nervous system and then over here we

have the hormone system and the

difference is that the communications

travel through the nerves with the

nervous system and their electrical

impulses and then the endocrine system

uses hormones as its communication

particles and they travel through the

blood okay so let’s first talk about the

two main parts of the nervous system

we’re just going to stick with nervous

system now not endocrine system we have

the peripheral nervous system which is

outside the central nervous system so we

have a central nervous system which is

the brain in the spinal cord and then we

have everything outside those are the

two main systems so central nervous

system controls and coordinates every

single body function and it does it

through pre-program like like almost

like genetic blueprints that have

messages that that send signals to keep

the body in a survival mode so

everything works and then the peripheral

nervous system has two parts one is the

somatic which somatic means body in

Latin but the somatic nervous system

controls all the muscles okay so

skeletal muscles and smooth muscles so

that’s what that system is and then we

have another part of the peripheral

nervous system called the autonomic

nervous system this is what I want to

spend a little bit more time on

autonomic is is a term a Greek term for

independent because it’s almost like

this can work independent of this over

here it has its own kind of microchips

or mini brains because it can run from

those things called ganglia remember the

ganglia of studying about that those are

like many little nerve centers that are

down your spinal column and you have

plexuses of nerves which are like

ganglia in the abdomen - like the solar

plexus and all these different wiring so

to speak

really simple when you think about it

there’s there’s a lot of wires that come

out of the brain and they either go to

the muscles or they go to the autonomic

nervous system which controls and

coordinates glands and organs and the

sympathetic nervous system is kind of

like the on switch so it activates

things and then you have the para

sympathetic means it’s kind of like an

off switch and the parasympathetic

controls more rest and digestion and the

sympathetic is more of the

flight-or-fight I guess a couple little

background pieces of information would

be to describe it like let’s say for

example you’re going to run upstairs and

if you did not have your body adapting

to that sudden shift and change in

gravity running up the blood wouldn’t

get up to your brain because when you

run it fast

all the Bloods going to go down to your

feet and you will pass out so in order

for the body to adapt to that change in

elevation and stress the sympathetic

nervous system kicks in there

pumps adrenaline and pushes the blood up

to the brain and it doesn’t on a

gradient so if the person has weak

sympathetics they won’t be able to react

towards stress they won’t be able to

prepare the body for a stressful State

and that’s what the sympathetic nervous

system does so the sympathetic nervous

system is if you can vision being chased

by a tiger you would have to increase

blood flow to the muscles you’re going

to have to increase brain acuteness and

awareness you’re going to have to

release dump a lot of sugars for the

muscles to use as fuel because you’re

not going to have time to burn five so

all those reactions of adapting the body

to either running away or fighting would

be the sympathetic nervous system now

the opposing system would be the parent

setting so once you run up to the top of

the the stairs your blood pressure has

to return and come down so this is the

recovery system the parasympathetic

kicks in when you’re at rest and when

you’re sleeping so that’s when

everything actually so it works hard at

calming you down the parasympathetic is

where you burn all the fat when you’re

sleeping right it’s a calming rest and

then that’s when you digest when you are

in a sympathetic mode the the

parasympathetic kind of shuts down and

to that degree it affects it kind of

blocks your reproductive system because

when you’re chased by a tiger you don’t

need to have a baby or something you

know to get pregnant but when you’re

actually being chased by a tiger you

also don’t need to digest so in other

words when you kick in the sympathetic

digestion shuts off reproductive shuts

off sleeping shuts off but when you’re

in parasympathetic everything is chilled

out you’re recovering your body is

adapting to things so the whole goal of

this system is to maintain something

called homeostasis now what is

homeostasis that is the a body’s ability

to adapt to some type of environmental

situation or change or stress so the

inside of your body is adapting to the

outside to maintain equilibrium okay to

a constant level so in the body there’s

all these certain conditions that our

body kind of stays in equilibrium like

let’s say temperature temperature is

98.6 the pH of your blood is seven point

three four or seven point three three

four one of the two the pH of your urine

should be 6.0 the blood pressure should

be 120 over 80 the pulse rate should be

72 these are all equilibrium things that

your body’s trying to maintain your

blood glucose should be 100 exactly

well the autonomic nervous system keep

all these adapting so if you actually go

outside and you actually get cold your

body heats up if you’re if you run up

stairs your blood pressure will adapt

and then the parasympathetic will keep

bringing it down to that equilibrium so

we get all these body functions that the

autonomic nervous system controls and it

controls it not necessarily on an on

switch or an off switch but more like a

dimmer switch

so there’s slow gradient approaches to

this system the Missis system so let’s

say you’re going for a mild jog well

this thing might be kicked in but you

have this one at the same time so

they’re kind of like two dimmer switches

that kind of on a gradient this will

increase and this will increase

depending on the level of effort or

change it occurs so if you see your

child your baby underneath the car it’s

going to be 100% sympathetic you’re

going to lift that car off the baby but

if you just see like a little roach that

you want to kill you might have like 10%

sympathetic and mostly parasympathetic

so really it’s not on-off switch is kind

of like a gradient approach and then

there’s an enteric system right here

which is the digestive system so that’s

the other the third autonomic nervous

system section enteric which is

digestion and this has just as many

neurons and nerve nerves

nerve endings as you would have in your

spinal column and so this system is

amazing because it it can work on its

own and it controls like a mesh around

the colon to actually allow it to pump

it’s called peristalsis or helping it

become mobile along the 3031 feet of

intestine so this is what that system

actually does so that’s pretty much the

basics of the different systems and then

in the next video I’m going to show you

how we measure the autonomic nervous

system