Ball and socket joint
Appearance
Ball and socket joint | |
---|---|
File:Gelenke Zeichnung01.jpg 1: Ball and socket joint; 2: Condyloid joint (Ellipsoid); 3: Saddle joint; 4 Hinge joint; 5: Pivot joint; | |
File:Gray327.png Capsule of shoulder-joint (distended). Anterior aspect. | |
Identifiers | |
TA | Lua error in Module:Wikidata at line 746: attempt to index field 'wikibase' (a nil value). |
TH | {{#property:P1694}} |
TE | {{#property:P1693}} |
FMA | {{#property:P1402}} |
Anatomical terminology [[[d:Lua error in Module:Wikidata at line 865: attempt to index field 'wikibase' (a nil value).|edit on Wikidata]]] |
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]
Examples[change]
Examples of this type of joint occur:
- in the hip, where the rounded head of the femur (ball) rests in the cup-like acetabulum (socket) of the pelvis.
- in the glenohumeral joint of the shoulder, where the rounded head of the humerus (ball) rests in the cup-like glenoid fossa (socket) of the shoulder blade.[2]
Other images[change]
-
Hip
-
Shoulder
References[change]
- ↑ "Ball-and-socket joint". Encyclopædia Britannica. Encyclopædia Britannica Online. Retrieved 10 March 2011.
- ↑ "Synovial Joints - Ball and Socket Joints". University of Michigan. Archived from the original on 10 March 2011. Retrieved 10 March 2011.