- Hello massage nurse.
Today, we're going to be doing lesson six,
which are the muscles of fluxion and extension
and the radio ulnar joint movements,
which is supernation and pronation.
So we'll start here with a fluxion,
as you can see, there's five major muscles that do fluxion.
We're going to start with the biceps.
Biceps remember means two,
So it has two origins.
One at the core court process.
Remember the coraca process
also has the insertion of the pec minor
and the origin of the coracobrachialis,
but that was the other lesson.
So right now we're going to focus on the biceps,
which is this in origin
and then the other origin is that the glenoid fossa.
So that it goes down and it inserts at the distal part.
I mean the proximal distal of the radio, radius.
Then you have your brachialis,
your brachialis muscle
is really the works force of flexion.
The only reason your biceps pop up even more with flexion
is because this really does, you know, is right underneath
and it makes it pop up more.
So it originates here
on the medial part, side of the
of the humerus.
Okay, so it's like right underneath the biceps
And in it inserts on the ulnar side, if
you can see right here.
You also have, let me see, your flexor.
Carpi radialis, it's also a flexor.
And it originates on the medial.
Medial side of the humerus
and it inserts right here at the carpel,
by the carpals.
So the flexor carpi radialis,
the brachial radialis,
and then the biceps and the brachials.
These are all elbow flexors.
The brachialis, brachioradialis originates right here
at the humerus on the distal part.
And then it inserts at the first carpi right here.
So these are one, two,
three, four,
which one am I missing?
Huh?
Pronator, oh pronator teres.
These are the main flexors,
so let's see you can flex
and these are the main flexors of your elbow.
Okay, so this, the pronator teres also originates right here
at the medial condyle
of the humerus and inserts at the radial side.
So these five muscles biceps,
brachialis, the pronator teres,
the brachioradialis,
and then the flexor carpi radialis;
all those five muscles are the ones
that are used for flexion.
Now for extension, it's your triceps.
There's only one muscle in the back the posterior part
and this is your triceps.
And it has, triceps has three origins.
The long head is right here
at the third part of the scapula.
And it goes all way down to the olecranon process.
The long head originates at the humorous here
and then it goes down to the olecranon process.
And then the medial head originates here.
And if you can extend real good,
you can really see,
you can see the different heads
on Leo because he's really pretty muscular here.
So the medial head originates in the,
like halfway through the through the humerus.
And again, it inserts on the olecranon process.
And the Anconeus is also another elbow flexor.
These two are the elbow,
I'm sorry extensors extensors, not flexors.
The now the, the flexors,
if you want to flex for me, Leo,
the flexors right here, you know, these,
this is musculocutaneous nerve.
Anything on the anterior part
is the musculocutaneous nerve.
Anything in the extension
in the posterior part is the radial nerve.
And over here when you are
in the anterior part are the,
is the media nerve.
The pronator teres, which originates here
and on the medial part of the humerus
and inserts on the radial side,
going across this way.
Sometimes the media nerve gets trapped going through here.
So when you're working on somebody and you know,
if the medial nerve also goes through the carpal tunnel,
which that's another session,
but any way you want to make sure
to work the pronator teres, pronator quadratus.
So if they're pronator teres,
pronator quadratus guess what they do.
They pronate, they originate here
on the medial side because they're going
to pull the arm this way to protonate.
And then the super Nader would be on this side.
However, we drew it on that arm because we didn't,
it didn't, you couldn't see it here anymore.
So the super Nader is on this side
and this is for supination.
The two muscles that supinate are the biceps brachii
and the super Nader.
Super nation is when you're holding,
there you go, when you're holding the soup;
this is super nation.
Pronation is when you spill the soup.
So the major muscle for,
for super nation is the biceps brachii.
This is also known as the corkscrew muscle because
it goes in, you know, for the super nation
is like a corkscrew, you know,
to make super nation pro nation fluxion and extension.
So there you have it.
We have nine muscles that we focused on.
The biceps, the brachialis, the brachioradialis.
The flexor carpi radialis and the teres,
the pronator teres, those are for flexion.
For extension is the triceps and the anconeus.
And then for pro nation will
be the pronator teres pronator quadratus.
And then for super nation would be the tricep,
I mean the biceps and the super Nader.
So those are the nine muscles for elbow flexion
and extension the radio ulnar joint.
We have two, we have the proximal,
radio ulnar joint and the distal radial ulnar joint.
And Oh, also the radius bone
is the one that rolls for pro nation over the ulnar.
The ulnar doesn't move.
It's the radial bone that moves over the ulnar.
So when you pronate, it's that? Yeah,
it's that radial bone, you know, moving over,
rolling over the ulnar.
So that would be it for less than six,
the nine muscles.
That's going to be your homework guys.
You guys got to draw all these muscles
and if you have to do among separate arms, go ahead.
I just try to do it all on one arm
to show you more or less, you know,
what it looks like.
And lesson seven will be next week.
So make sure you draw the muscles
and I hope this was helpful.
And until the next time guys, create a great day.