A discus articularis (or also Fibrocartilago interarticularis from Latin articular disc) is an inter- joint disc (similar to the menisci ) made up of fibrous cartilage and tight, parallel- fiber connective tissue , which usually divides the joint cavity into two separate chambers.
Joint discs have several tasks. They serve to enlarge the contact area between the joint parts. Furthermore, they compensate for inequalities ( incongruences ) of the joint surfaces and additionally buffer and distribute the pressure on the joint . They also help guide the joint head in the socket.
Typical examples of flexible disks are located
- in the sternum-clavicle joint or sternoclavicular joint ( articulatio sternoclavicularis ) between the collarbone ( clavicle ) and breastbone ( sternum ),
- in the shoulder joint ( articulatio acromioclavicularis ) between the clavicle and shoulder blade ( scapula ),
- between ulna and triangular leg as well
- in the TMJ ( temporomandibular joint ) between the lower jaw ( mandible ) and temporal bone ( temporal Os ).
The articular disc should not with a intervertebral disc ( disc be confused).