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6 types of diarthrosis joints
- 1. Gliding
- 2. Hinge
- 3. Pivot
- 4. Ball and Socket
- 5. Saddle
- 6. Condyloid
What is included in a diarthrodial joint structure?
- Articular Capsule (fibrous membrane and synovial membrane)
- synovial fluid/cavity
- articular cartilage
no movement in any one plane
movement in one plane
moves in two planes
moves in three planes
- nonaxial joints that lie next to each other and glide together
- ex. intercarpal/intertarsal/facets/sternoclavicular
- uniaxial joints that act like a hinge on a door
- ex. elbow, knee
- uniaxial joint of one bone rotating in a ring of another
- ex. atlantoaxial joint/ radius/ ulna joint
Ball and Socket joints
- triaxial joint where movement is permited in all planes
- ex. shoulder, hip
- biaxial joints where opposing bones that come together are convex and concave so the surface of the joints is saddle shaped.
- ex. thumb
- biaxial joint similar to saddle joints except it is a condyle of one bone that fits into an elliptical cavity of another bone.
- ex. knuckles/ TMJ