The articular disk (or disc) is a thin, oval plate of
fibrocartilage
Fibrocartilage consists of a mixture of white fibrous tissue and cartilaginous tissue in various proportions. It owes its inflexibility and toughness to the former of these constituents, and its elasticity to the latter. It is the only type of ...
present in several
joints
A joint or articulation (or articular surface) is the connection made between bones, ossicles, or other hard structures in the body which link an animal's skeletal system into a functional whole.Saladin, Ken. Anatomy & Physiology. 7th ed. McGraw- ...
which separates synovial cavities. This separation of the cavity space allows for separate movements to occur in each space.
The presence of an articular disk also permits a more even distribution of forces between the articulating surfaces of bones, increases the stability of the joint, and aids in directing the flow of synovial fluid to areas of the articular cartilage that experience the most friction.
The term "
meniscus" has a very similar meaning.
Module – Introduction to Joints
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Additional images
File:Gray325.png, Sternoclavicular articulation. Anterior view.
File:Gray300.png , Diagrammatic section of a diarthrodial joint, with an articular disk.
See also
* Triangular fibrocartilage ("articular disk of the distal radioulnar articulation")
* Articular disk of the temporomandibular joint
* Articular disk of sternoclavicular articulation
The articular disc of the sternoclavicular joint is flat and nearly circular, interposed between the articulating surfaces of the sternum and clavicle.
It is attached, above, to the upper and posterior border of the articular surface of the clavic ...
References
External links
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Joints
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