Pivot joint
From Wikipedia, the free encyclopedia
| Pivot joint | |
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| 1: Ball and socket joint; 2: Condyloid joint (Ellipsoid); 3: Saddle joint; 4 Hinge joint; 5: Pivot joint; | |
| Latin | articulatio trochoidea |
| Gray's | subject #70 285 |
A Pivot joint (trochoid joint, rotary joint) is a joint that moves by rotating. For example, the joint that allows humans to rotate their heads on their necks is a pivot joint.
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[edit] Biology
Pivot joints are found in humans in the neck, forearms, knees, and other parts of the skeletal system that are able to rotate.
A pivot joint in biology is composed of a bone and ligament ring rotating around another bone.
[edit] Mechanics
Pivot joints are used in mechanics for things such as windshield wipers. They are useful for machines that have to rotate in order to complete their job.
[edit] References
http://www.answers.com/pivot%20joint http://medical.merriam-webster.com/medical/pivot%20joint http://www.freepatentsonline.com/EP0592246.html http://www.teachpe.com/anatomy/joints.php http://www.preventdisease.com/fitness/fundament/articles/types_of_joints.html
[edit] External links
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This musculoskeletal system article is a stub. You can help Wikipedia by expanding it. |
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated.
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