Radius and Ulna

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by Natalia Gomez3 views·Updated Feb 18, 2024
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  1. OK.
  2. Hi guys, I will be discussing about the radius and ulna
  3. different landmarks and structures on these bones. So let's get to it.
  4. So, right here we have a picture of the radius and ulna.
  5. Um is this is what forms the forearm of our upper limb?
  6. Um These two parallel long bones that articulate with the
  7. humerus proximately and the bones of the wrist distally,
  8. the radius and ulna articulate with each other.
  9. Ok.
  10. So we're gonna start off with the radius
  11. and I'm just going to zoom in. So you guys can kind of see a little bit.
  12. Um Let's just focus on my right on my left hand side, excuse me.
  13. Um And we will be discussing
  14. these certain landmarks, head of the radius,
  15. radial tuberosity and the styloid process. OK.
  16. So
  17. if you see here,
  18. let me just zoom in real quick. OK.
  19. Right here.
  20. I wish I had a pointer thing or something that would point to that,
  21. but this is the best I can do.
  22. So here we have the head of the humerus. It has a concave
  23. or cupped proximal articular surface that articulates with the kum
  24. of
  25. the humerus. OK.
  26. Pretty direct,
  27. pretty simple. OK.
  28. Um Also, as you can see if you see at the very, very top of the radius,
  29. you can also see that it's a very, it has a circular head.
  30. So that way you can always use that and distinguish that this is in fact, the bone,
  31. the radius bone because the ulna,
  32. the ulna looks a little different and I'll show
  33. you what I mean by how it looks different.
  34. Um But this would definitely help you pinpoint like this is the the radius. OK.
  35. So moving on,
  36. we see
  37. um distal to the head of the radius on the on on the anterior surface,
  38. an anatomical position is the rough bump or the rump,
  39. rough rough spot for the radial tuberosity.
  40. OK?
  41. Like again,
  42. this is pretty direct.
  43. So um
  44. this, I know that this is the
  45. the radial
  46. tuberosity.
  47. OK?
  48. And then if we go down further,
  49. we will see
  50. the styloid process which is the distal end of our radius on the lateral
  51. side.
  52. OK.
  53. So there you go, we have the three
  54. um landmarks
  55. for
  56. meridius.
  57. Also just another helpful tip to know that this is the radius
  58. is this is the lateral bone of the forearm in anatomical position.
  59. OK.
  60. Um And then also,
  61. I don't know if you guys have ever been to the doctors and they take your radial pulse
  62. that will also give you an idea of where your radius is at your radial pulse.
  63. And then also it's close to your thumb. So
  64. like I said, it's pretty direct, pretty set, you know, forward and whatnot.
  65. So now moving on,
  66. we will be going and talking about
  67. the owner.
  68. So here we're going to zoom in a little bit.
  69. We have the anterior view of the ona and the lateral view.
  70. I did a lateral view just because I want you to see
  71. the C shaped part of it once we get into those landmarks.
  72. So on my left hand side, we're going to talk about the
  73. ICR
  74. process,
  75. the coronoid process, radio
  76. notch,
  77. the
  78. trochlear notch or semi
  79. lunar notch and then the styloid process or
  80. the
  81. ulnar
  82. styloid process. OK.
  83. So I'm gonna zoom in real quick
  84. and right here you can automatically tell this is the
  85. ulna only because of the top portion of the bone.
  86. You have this funky looking thing over here
  87. and it's just,
  88. you can just tell this is all
  89. I like to me. I like to think of it
  90. as like
  91. a,
  92. I
  93. don't know like a little bird if
  94. well, yeah, a little bird or if you get more into detail, if you, if right now,
  95. when I zoom in a little bit,
  96. you'll see it has like ac shape, so we'll get into that.
  97. Um
  98. So let me zoom in. So you can see the
  99. anterior view a little bit.
  100. OK.
  101. So starting off, this is the medial bone
  102. or the medial. Uh
  103. No, yeah, the medial bone of the form
  104. in anatomical position. Ok.
  105. You know how we have that, um,
  106. the, the little bump by your wrist,
  107. that
  108. is your ulna
  109. right there.
  110. You know that little
  111. bone that, that little bone that sticks out.
  112. Yeah, that one that's, that's, that's how, you know, that's the ulna
  113. and then also
  114. it's closest to your pinky.
  115. So,
  116. yeah,
  117. that's how you always remember that. That's the old one too.
  118. Ok. So let's start off with the
  119. Ron process, which is the proximal end of the ulna,
  120. the elbow basically.
  121. And then um
  122. you can see it from the anterior view and then also this is the lateral view.
  123. But if you were to
  124. do it on the posterior view, you could see
  125. the back of it
  126. kind of looks like the back of a snake's head in a way.
  127. But
  128. yeah, it's pretty, pretty easy, pretty easy to know.
  129. And then the coronoid
  130. process
  131. is inferior
  132. to the troop.
  133. OK.
  134. Uh So you can see
  135. that the coronoid
  136. process is right here by,
  137. I'm gonna use a lateral view more just because it's easier to show it.
  138. So right here
  139. it is inferior to the
  140. trochlear.
  141. OK.
  142. So it's below it.
  143. And then the tr
  144. the tr
  145. tr
  146. trochlear
  147. trochlear
  148. is
  149. the C shaped depression
  150. in the front.
  151. So you see that,
  152. see how it has a little C shape there.
  153. So you'll see
  154. the difference there
  155. and how you could tell that that's, that's the the landmark there
  156. and then the radio
  157. noge is this little
  158. um
  159. it's on the lateral side of the coronoid process.
  160. The head of the radius articulates right there.
  161. Hence the name radio notch, you know,
  162. and then
  163. if you go, let me zoom out.
  164. So we're gonna see
  165. the styloid process
  166. right there.
  167. I'm zooming in.
  168. So right there,
  169. we have the styloid process at the distal end which is the wrist and of the bone,
  170. OK? Like I said, it is the bumpy feel on your wrist.
  171. That's another way of knowing that that's your,
  172. you're OK,
  173. let me zoom out
  174. and then I'll just show you guys a better picture
  175. with all of it together.
  176. So those are basically the terms that we need
  177. to remember the landmarks that we need to remember.
  178. And here is a full picture.
  179. This is the
  180. and interior post your review of the radius and the ulna together.
  181. So I know there's a lot of terms here,
  182. but you're only gonna need to know the ones that I had presented previously.
  183. OK?
  184. But this is the idea of how the ulna and the radius
  185. are going to be connected.
  186. OK. So we got,
  187. and if you look right here at the very top, at the very beginning,
  188. the
  189. ICR process, the trochlear
  190. notch,
  191. the coronoid process and then we have the head of the humerus,
  192. we got the radial tuberosity
  193. and then
  194. you can see the styloid process at the very bottom of the radius.
  195. And then we have here on the poster view
  196. we have
  197. on the opposite side, the
  198. styloid process of the radius,
  199. the styloid process of the ulna and then we have the
  200. neck of the radius and the head of the radius.
  201. Ok.
  202. So yeah, this is
  203. hold on, I'm trying to get it straight.
  204. This is in fact the radius and the
  205. ona and I hope you guys
  206. um
  207. are able to learn something from this video.
  208. Like I honestly feel this, these are pretty direct.
  209. Um
  210. I feel like what helps the most is knowing the shape of the bone
  211. and that would help you distinguish which,
  212. which bone it is.
  213. And then after that,
  214. I would focus more on knowing if this is posterior or anterior or right or left
  215. me or lateral, depending on the landmarks of where you're trying to,
  216. where what you're trying to learn or what terms you need to know.
  217. So I feel like that's what really makes it easier to know
  218. and to kind of memorize and just,
  219. you know, go from there.
  220. OK. Thank you guys.