Radiocarpal Joint (The Wrist)

Join this free martial arts wiki. Add info & help beginners with Shotokan Kata, Kicks, Punches, Grappling, Taekwondo Forms & Patterns, Aikido, Goju-Ryu, Krav Maga, Bo Staff, Judo, Kyokushin, etc. Fitness experts can help with Strength Training, Core Exercises, Warm-Ups, Balance, Stretching, Conditioning, etc. Talk with fellow martial artists by joining our Wiki Community.

Wiki Revision Date - 04 Jun 2015 01:53

The Wrist

The wrist can refer to multiple anatomical connections around the hand.

  1. The connection between the radius and the carpal bones (the overall radiocarpal joint and commonly used term).
  2. The connection between all of the eight little carpal bones.
  3. Or the connection between the bones of the forearm, eight carpal bones, and the metacarpals of the hand.

Note: For this wiki the last definition will be used focusing on the overall movement of the wrist in terms of martial arts.

Bones: Radius, ulnar, eight carpals composed into two rows, the metacarpals.

Cartilage: There is an articular disc between the radius and the carpal bones.

Ligaments: There are intrinsic ligaments that connect only between (to and from) the carpal bones. There are also extrinsic ligaments that connect the carpals to the radius and ulnar or the metacarpals.

Tendons: There are a number of long thing tendons that run about a third of the forearm from the wrist, these connect to the bones and help bend the wrist. They are most prevalent on the bottom of the wrist where if relaxed can easily be felt.

Muscles: There are three little flexor muscles on the underside of the forearm that contract and pull the hand down downwards. There are also three little extensor muscles on the top of the forearm that contract and pull the hand upwards. A combination of extensors and flexors is used to deviate the wrist from side to side.

Range of motion: The wrist is able to flex downwards at roughly an 80 degree angle. With extension the hand is able to bend upwards about 70 degrees. The wrist is capable of deviating to the side towards the radius at roughly 20 degrees and towards the ulnar at roughly 40 degrees.

Manipulation: The wrist is very nice starting point for securing an attacker. Many wrist locks start with the locker grabbing the attacker's hand and wrapping their fingers around the metacarpal of the thumb and the locker's thumb between the metacarpal of the index and middle finger. The reason for this being is that immediate pressure is put on the (radial) carpal bones. Additional pressure will start to rip intrinsic and extrinsic ligaments and then put pressure on the tendons of the flexors and extensors. With a twist pressure can be channeled to the supinators and the pronators of the forearm as well as pressure on the elbow.

The overall mechanics of these locks on the wrist can be simple but the forces the exert on all the bones, muscles, ligaments, and tendons can be quite complex. For some nice wrist examples please look at the the Hapkido Joint Locks page.

Injury: The main concern for injury with applied pressure being damage to the tendons and ligaments around the wrist. Falling on palm of the hand is likely fracture one of the small carpal bones which can take 8 to 12 weeks to heal.

Stretching: Due to the pressure on the wrist it is best for martial artists to stretch their wrists, which would give them additional room for their wrist to bend giving them the needed second to get out of the hold. This stretching will also slightly decrease the pain of the beginning of a wrist lock. For more on stretching the wrist please visit the Wrist Stretches page.

For information on additional joints please refer back to the Joints page.


Join the Wiki Community!

We hope you become a wiki member. You can join via the wiki or via Facebook.
Talk to fellow martial artists on the wiki community. Members can ask questions, post answers & videos and even tell the occasional martial arts joke!

Latest Pages Added to Wiki

Popular Community Posts

Latest Posts Added to Community

  • Escrima "on the rocks" a clip of some fun stick work with one of my students last week blocking close quarter butting strikes while using footwork on the rocks by the shallows of the beach gonna take some more environmental training videos here in the next few weeks
  • What is the biggest downside of martial arts training? How would you answer a potential student if they asked "What is the biggest downside of martial arts training"? I know that we all love martial arts training... but please do not give any answers like there are no downsides, etc. Try to point out some...
  • Introduction Hello Everyone. Its good to see martial artist forum like this. i would like to really interact with you all and share anything of good use .
  • Tournament Results I asked about special tournament training and got some good answers. Well the results from the tournament I did over the weekend. I got 2nd place in both Blocker Sparring and Grappling. In grappling there was only me and one other competitor who hap...



Martial Arts Books
(Click on the pictures below to learn more about these books)


At no extra cost to you, Black Belt Wiki makes a small commission if you buy products via these links. Your purchase helps keep this wiki free for all visitors. Thank you for your support!






Material on this wiki may not be copied or reproduced without the written approval of Black Belt Wiki.
All rights reserved. For other terms & conditions, please read our legal disclaimer. This site is for informational purposes only. All martial arts techniques and fitness exercises should be supervised by a trained martial arts instructor in order to prevent injuries and to ensure the proper technique is utilized. If you have had an injury or are in pain, please see a doctor before starting or continuing any martial arts and/or physical fitness program.




Wiki
Martial Arts Products