Radius and Ulna

Audio Transcript Auto-generated

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  OK.

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  Hi guys, I will be discussing about the radius and ulna

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  different landmarks and structures on these bones. So let's get to it.

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  So, right here we have a picture of the radius and ulna.

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  Um is this is what forms the forearm of our upper limb?

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  Um These two parallel long bones that articulate with the

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  humerus proximately and the bones of the wrist distally,

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  the radius and ulna articulate with each other.

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  Ok.

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  So we're gonna start off with the radius

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  and I'm just going to zoom in. So you guys can kind of see a little bit.

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  Um Let's just focus on my right on my left hand side, excuse me.

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  Um And we will be discussing

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  these certain landmarks, head of the radius,

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  radial tuberosity and the styloid process. OK.

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  So

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  if you see here,

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  let me just zoom in real quick. OK.

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  Right here.

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  I wish I had a pointer thing or something that would point to that,

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  but this is the best I can do.

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  So here we have the head of the humerus. It has a concave

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  or cupped proximal articular surface that articulates with the kum

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  of

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  the humerus. OK.

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  Pretty direct,

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  pretty simple. OK.

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  Um Also, as you can see if you see at the very, very top of the radius,

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  you can also see that it's a very, it has a circular head.

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  So that way you can always use that and distinguish that this is in fact, the bone,

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  the radius bone because the ulna,

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  the ulna looks a little different and I'll show

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  you what I mean by how it looks different.

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  Um But this would definitely help you pinpoint like this is the the radius. OK.

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  So moving on,

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  we see

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  um distal to the head of the radius on the on on the anterior surface,

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  an anatomical position is the rough bump or the rump,

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  rough rough spot for the radial tuberosity.

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  OK?

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  Like again,

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  this is pretty direct.

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  So um

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  this, I know that this is the

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  the radial

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  tuberosity.

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  OK?

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  And then if we go down further,

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  we will see

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  the styloid process which is the distal end of our radius on the lateral

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  side.

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  OK.

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  So there you go, we have the three

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  um landmarks

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  for

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  meridius.

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  Also just another helpful tip to know that this is the radius

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  is this is the lateral bone of the forearm in anatomical position.

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  OK.

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  Um And then also,

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  I don't know if you guys have ever been to the doctors and they take your radial pulse

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  that will also give you an idea of where your radius is at your radial pulse.

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  And then also it's close to your thumb. So

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  like I said, it's pretty direct, pretty set, you know, forward and whatnot.

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  So now moving on,

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  we will be going and talking about

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  the owner.

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  So here we're going to zoom in a little bit.

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  We have the anterior view of the ona and the lateral view.

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  I did a lateral view just because I want you to see

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  the C shaped part of it once we get into those landmarks.

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  So on my left hand side, we're going to talk about the

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  ICR

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  process,

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  the coronoid process, radio

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  notch,

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  the

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  trochlear notch or semi

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  lunar notch and then the styloid process or

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  the

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  ulnar

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  styloid process. OK.

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  So I'm gonna zoom in real quick

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  and right here you can automatically tell this is the

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  ulna only because of the top portion of the bone.

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  You have this funky looking thing over here

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  and it's just,

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  you can just tell this is all

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  I like to me. I like to think of it

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  as like

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  a,

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  I

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  don't know like a little bird if

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  well, yeah, a little bird or if you get more into detail, if you, if right now,

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  when I zoom in a little bit,

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  you'll see it has like ac shape, so we'll get into that.

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  Um

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  So let me zoom in. So you can see the

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  anterior view a little bit.

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  OK.

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  So starting off, this is the medial bone

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  or the medial. Uh

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  No, yeah, the medial bone of the form

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  in anatomical position. Ok.

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  You know how we have that, um,

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  the, the little bump by your wrist,

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  that

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  is your ulna

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  right there.

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  You know that little

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  bone that, that little bone that sticks out.

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  Yeah, that one that's, that's, that's how, you know, that's the ulna

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  and then also

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  it's closest to your pinky.

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  So,

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  yeah,

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  that's how you always remember that. That's the old one too.

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  Ok. So let's start off with the

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  Ron process, which is the proximal end of the ulna,

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  the elbow basically.

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  And then um

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  you can see it from the anterior view and then also this is the lateral view.

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  But if you were to

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  do it on the posterior view, you could see

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  the back of it

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  kind of looks like the back of a snake's head in a way.

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  But

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  yeah, it's pretty, pretty easy, pretty easy to know.

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  And then the coronoid

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  process

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  is inferior

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  to the troop.

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  OK.

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  Uh So you can see

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  that the coronoid

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  process is right here by,

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  I'm gonna use a lateral view more just because it's easier to show it.

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  So right here

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  it is inferior to the

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  trochlear.

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  OK.

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  So it's below it.

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  And then the tr

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  the tr

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  tr

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  trochlear

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  trochlear

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  is

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  the C shaped depression

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  in the front.

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  So you see that,

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  see how it has a little C shape there.

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  So you'll see

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  the difference there

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  and how you could tell that that's, that's the the landmark there

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  and then the radio

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  noge is this little

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  um

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  it's on the lateral side of the coronoid process.

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  The head of the radius articulates right there.

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  Hence the name radio notch, you know,

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  and then

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  if you go, let me zoom out.

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  So we're gonna see

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  the styloid process

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  right there.

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  I'm zooming in.

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  So right there,

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  we have the styloid process at the distal end which is the wrist and of the bone,

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  OK? Like I said, it is the bumpy feel on your wrist.

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  That's another way of knowing that that's your,

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  you're OK,

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  let me zoom out

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  and then I'll just show you guys a better picture

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  with all of it together.

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  So those are basically the terms that we need

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  to remember the landmarks that we need to remember.

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  And here is a full picture.

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  This is the

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  and interior post your review of the radius and the ulna together.

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  So I know there's a lot of terms here,

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  but you're only gonna need to know the ones that I had presented previously.

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  OK?

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  But this is the idea of how the ulna and the radius

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  are going to be connected.

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  OK. So we got,

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  and if you look right here at the very top, at the very beginning,

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  the

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  ICR process, the trochlear

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  notch,

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  the coronoid process and then we have the head of the humerus,

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  we got the radial tuberosity

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  and then

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  you can see the styloid process at the very bottom of the radius.

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  And then we have here on the poster view

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  we have

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  on the opposite side, the

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  styloid process of the radius,

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  the styloid process of the ulna and then we have the

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  neck of the radius and the head of the radius.

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  Ok.

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  So yeah, this is

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  hold on, I'm trying to get it straight.

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  This is in fact the radius and the

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  ona and I hope you guys

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  um

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  are able to learn something from this video.

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  Like I honestly feel this, these are pretty direct.

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  Um

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  I feel like what helps the most is knowing the shape of the bone

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  and that would help you distinguish which,

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  which bone it is.

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  And then after that,

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  I would focus more on knowing if this is posterior or anterior or right or left

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  me or lateral, depending on the landmarks of where you're trying to,

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  where what you're trying to learn or what terms you need to know.

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  So I feel like that's what really makes it easier to know

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  and to kind of memorize and just,

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  you know, go from there.

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  OK. Thank you guys.