9.2: Classification of Joints - Medicine LibreTexts
https://med.libretexts.org/Bookshelves/Anatomy_and_Physiology/Anatomy_and_Physiology_2e_(OpenStax)/02%3A_Support_and_Movement/09%3A_Joints/9.02%3A_Classification_of_Joints
WEBFeb 24, 2023 · A uniaxial joint only allows for a motion in a single plane (around a single axis). The elbow joint, which only allows for bending or straightening, is an example of a uniaxial joint. A biaxial joint allows for motions within two planes. An example of a biaxial joint is a metacarpophalangeal joint (knuckle joint) of the hand.
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