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Ball and socket joint

From Simple English Wikipedia, the free encyclopedia
Ball and socket joint
1: Ball and socket joint; 2: Condyloid joint (Ellipsoid); 3: Saddle joint; 4 Hinge joint; 5: Pivot joint;
Capsule of shoulder-joint (distended). Anterior aspect.
Anatomical terminology

A ball and socket joint (enarthrosis, spheroidal joint) is a joint in which the ball-shaped surface of a bone fits into the cup-like indentation of another bone. This type of joint allows the bone to move in a 360° angle—with more freedom than other joints.[1]


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Examples of this type of joint occur:

Other images

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  1. "Ball-and-socket joint". Encyclopædia Britannica. Encyclopædia Britannica Online. Retrieved 10 March 2011.
  2. "Synovial Joints - Ball and Socket Joints". University of Michigan. Archived from the original on 10 March 2011. Retrieved 10 March 2011.