Dixon, A. Pivot joint. Reference article, Radiopaedia. Pivot joints Rotary joint Rotary joints Trochoid joint Trochoid joints. URL of Article. Movements Pivot joints allow rotation around a single axis only and therefore mechanically speaking they possess only one degree of freedom.
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Examples of mobile joints include the following:. Ball-and-socket joints. Ball-and-socket joints, such as the shoulder and hip joints, allow backward, forward, sideways, and rotating movements. Hinge joints. Hinge joints, such as in the fingers, knees, elbows, and toes, allow only bending and straightening movements.
Ellipsoidal joints. Ellipsoidal joints, such as the wrist joint, allow all types of movement except pivotal movements. An example of a saddle joint is the thumb joint, which can move back and forth and up and down, but more freely than the wrist or fingers Figure 6. Figure 6. The carpometacarpal joints in the thumb are examples of saddle joints. Ball-and-socket joints possess a rounded, ball-like end of one bone fitting into a cuplike socket of another bone.
This organization allows the greatest range of motion, as all movement types are possible in all directions. Examples of ball-and-socket joints are the shoulder and hip joints Figure 7. Improve this page Learn More. Skip to main content. Module The Musculoskeletal System. Search for:. Figure 7. The shoulder joint is an example of a ball-and-socket joint.
Watch this animation showing the six types of synovial joints. Try It. Did you have an idea for improving this content? Licenses and Attributions.
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