There are a lot of important muscles and bones in the hand region which allow us to handle the world around us. Find out what they look like in cross section on the full length version of this video here:
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The wrist joint can be divided into three main parts. There is the radiocarpal joint, the ulnocarpal joint, and the midcarpal joints. The joints derive their arterial supply from the dorsal and palmar carpal arches.
The radius articulates with the scaphoid laterally and the lunate medially. The ulna articulates with a triangular pad of fibrocartilage, which is interposed between it and the triquetrum bone. When extended, the wrist joint creates torque for the long flexors to perform their movements with higher strength. The mid carpal joint is between the proximal and distal row of carpals. It is active in early flexion and extension as well as radial and ulnar deviation. In late flexion and extension, the scaphoid bridges the proximal and distal carpal rows, which consequently move in unison.
The hand is an exquisite example of engineering. The complexity of its movements, as well as its functional use make it perfect for working with tools. The blood supply is derived from the superficial and deep palmar arches from the ulnar and radial arteries respectively. The nerve supply is from the ulnar and median nerves (mainly ulnar).
In the full version of this video, we will cover the following topics:
- bones found in the wrist and hand in cross section;
- muscles of the wrist and hand seen in cross section;
- arteries, veins and nerves of the wrist and hand in cross section.
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Want to test your knowledge on the cross-sectional anatomy of the hand and wrist? Take this quiz: https://khub.me/22xrc
Read more on the anatomy of the regions of the upper limb on this article https://khub.me/laae3
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Cross sections of the upper extremity: wrist and hand (preview) - Human Anatomy | Kenhub | |
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| Education | Upload TimePublished on 23 Jul 2018 |
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