The articular disk (or disc) is a thin, oval plate of fibrocartilage present in several joints which separates synovial cavities. This separation of the cavity space allows for separate movements to occur in each space.
Vertical section through the articulations at the wrist, showing the synovial cavities. (Articular disk labeled at center right.)
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.
- Anatomy figure: 10:06-15 at Human Anatomy Online, SUNY Downstate Medical Center
- Hand kinesiology at the University of Kansas Medical Center
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