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    Hi,
    I found this about plane joints on the internet : "arthrodial joint, under physiological conditions, allows only gliding movement". So it seems logical to me that they have only two degrees of freedom.
    but then I wrote in my notes they have three degrees of freedom, and I found that on sites about anatomy ...
    Could someone help me ?
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    (Original post by icey98)
    Hi,
    I found this about plane joints on the internet : "arthrodial joint, under physiological conditions, allows only gliding movement". So it seems logical to me that they have only two degrees of freedom.
    but then I wrote in my notes they have three degrees of freedom, and I found that on sites about anatomy ...
    Could someone help me ?
    Well, if you think about it, a joint that allows gliding movement is going to have 3 degrees of freedom (albeit limited movements). Those movements will be flexion/extension, rotation, and deviation. Imagine rigidly cellotaping 2 sticks together, you can get all the movements mentioned (but it will be limited). An example of a joint with 2 degrees of freedom would be the radiocarpal joints, which don't allow rotation so that you can pronate the hand by pronating the forearm. And as you probably know, the elbow joint is an example of a joint with 1 degree of freedom.
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    Thanks for your answer ! It is clearer now
 
 
 
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