What motion does a saddle joint allow? What movement does a pivot joint allow? (please don't say pivotal) Thanks. :)
Also, where are saddle joints located in my hand? Thanksss!
Since this is not my area of expertise, I searched Google under the key words "saddle joint motion" to get these possible sources:
https://www.google.com/search?client=safari&rls=en&q=saddle+joint+motion&ie=UTF-8&oe=UTF-8&gws_rd=ssl
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
http://www.hackcollege.com/blog/2011/11/23/infographic-get-more-out-of-google.html
A saddle joint allows movement in two planes, which includes flexion, extension, abduction, adduction, and circumduction. To understand this, you can take a look at your thumb. Move your thumb towards your fingers (flexion) and away from your fingers (extension). Then, move your thumb away from your hand (abduction) and towards your hand (adduction). Finally, try moving your thumb in a circular motion (circumduction). These movements are possible due to the shape and structure of a saddle joint.
On the other hand, a pivot joint allows rotation around its own longitudinal axis. To understand this, you can refer to the joint between your neck and your skull. Rotate your head from side to side, as if shaking your head "no." This rotational movement is made possible by the pivot joint in your neck, allowing the skull to rotate on the spinal column.
By understanding the structure and observing the movements of these joints, you can grasp the types of motions they enable.