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Ball-and-socket joint
Ball-shaped surface of one rounded bone fits into the cup-like depression of another bone
Ball-shaped surface of one rounded bone fits into the cup-like depression of another bone
| Field | Value |
|---|---|
| Name | Ball and socket joint |
| Image | Gelenke Zeichnung01.jpg |
| Caption | **1**: Ball and socket joint; **2**: Condyloid joint (Ellipsoid); **3**: Saddle joint; **4** Hinge joint; **5**: Pivot joint |
| Image2 | Gray327.png |
| Caption2 | Capsule of shoulder-joint (distended). Anterior aspect. |
bone joints
The ball-and-socket joint (or spheroid joint) is a type of synovial joint in which the ball-shaped surface of one rounded bone fits into the cup-like depression of another bone. The distal bone is capable of motion around an indefinite number of axes, which have one common center. This enables the joint to move in many directions.
An enarthrosis is a special kind of spheroidal joint in which the socket covers the sphere beyond its equator.
Examples of joints
Examples of this form of articulation are found in the hip, where the round head of the femur (ball) rests in the cup-like acetabulum (socket) of the pelvis; and in the shoulder joint, where the rounded upper extremity of the humerus (ball) rests in the cup-like glenoid fossa (socket) of the shoulder blade. (The shoulder also includes a sternoclavicular joint.)
Ball and Socket Joint Animation
Diagrams
Kugelgelenk.jpg|Hip Gray327.png|Shoulder Ball and Socket Joint (Hip joint).svg|Details of hip joint.
References
References
- Platzer, Werner (2008) ''Color Atlas of Human Anatomy'', Volume 1, [https://books.google.com/books?id=T9bb4T422j8C&pg=PA28 p.28]
- And the phalanges (toes, fingers). [http://anatomy.med.umich.edu/modules/joints_module/joints_20.html Introduction to Joints: Synovial Joints - Ball and Socket Joints] {{webarchive. link. (2011-07-20)
This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.
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