The forearm is the part of the upper limb between the upper arm and wrist, and comprises lots of important muscles. Watch the full video now to learn everything about the forearm in cross section:
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The forearm is the region between the elbow and wrist joint. It comprises two bones, the radius and the ulna. The brachial artery divides into the radial and ulnar, which run down the forearm on their respective sides. The ulnar artery also gives rise to the anterior and posterior interosseus arteries that supply the deep muscles of the flexor and extensor compartment. The nerve supply is from the ulnar and median nerves (mainly median).
The proximal part of the radius is the head, and the distal part is the base, and vice versa for the ulna. A tough interosseus membrane connects the two bones and distributes the load. The fibers of this membrane are very tough as well as flexible, and are orientated in an obliquely downward direction. There is also a fibrous structure called the oblique cord, which is thought by some to be vestigial, but does offer some structural advantage in connecting the bones.
On the full version of this tutorial, we will cover the following topics:
- orientation of the forearm when looked at in cross section;
- bones of the forearm;
- muscles of the forearm;
- arteries, veins and nerves of the forearm.
To master this topic, click on the link and carry on watching the full video (available to Premium members): https://khub.me/rlv3j !
Want to test your knowledge on the structures found on the forearm at the level of the supinator muscle? Take this quiz: https://khub.me/5dqnh
Read more on all the regions of the upper extremity on this article https://khub.me/h1ep9
For more engaging video tutorials, interactive quizzes, articles and an atlas of Human anatomy and histology, go to https://khub.me/mc3ug
Cross sections of the upper limb at the level of the forearm (preview) - Human Anatomy | Kenhub | |
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| Education | Upload TimePublished on 10 Jul 2018 |
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