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Ball and socket joint

 

 
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Ball and socket joint
 
 
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A ball and socket joint (enarthrosis, spheroidal joint) is a jointJoint

A joint is the location at which two bones make contact....
 in which the distal bone is capable of motion around an indefinite number of axes, which have one common center.It helps the bone to move in a 360o angle.

In a ball and socket (or spheroid) joint, the ball-shaped surface of one bone fits into the cuplike depression of another.

The ball and socket joint is a movable joint, that consists of one bone that is rounded and that fits within a cuplike bone.

Movements

Movements possible are flexionFlexion

In anatomy, Flexion is movement whereby bones or other parts of the body, including the trunk, are brought closer together b...
-extensionExtension (kinesiology)

Extension is a movement of a joint that results in increased angle between two bones or body surfaces at a joint....
, abductionFacts About Abduction (kinesiology)

Abduction, in functional anatomy, is a movement which draws a limb away from the median plane of the body....
-adductionAdduction

Adduction is a movement which brings a limb ? arm or leg ? closer to the sagittal plane of the body....
, rotationRotation

Rotation is the movement of an object in a circular motion....
 (triaxial) and circumductionCircumduction

Circumduction may refer to:* Circumduction , the circular movement of a limb...
.

Examples

Examples of this form of articulation are found in the hip and shoulderShoulder

In human anatomy, the shoulder comprises the part of the body where the arm attaches to the torso....
.

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