Chapter 9: Articulations Flashcards
Functional classification of joints
- synarthroses
- amphiarthroses
- diarthroses
Synarthroses
immobile joints; can be fibrous or cartilaginous joints
Amphiarthroses
slightly mobile joints; can be fibrous or cartilaginous joints
Diarthroses
freely mobile joints; all synovial joints
Structural classification of joints
- fibrous
- cartilaginous
- synovial
Fibrous joints
- gomphoses
- sutures
-syndesmoses
Gomphoses
“peg in socket”; articulations of teeth
Suture
completely fused across the suture line; skull bones
Syndesmoses
provides the pivot for two long bones; found between the radius and ulna and between the tibia and fibula
Cartilaginous joints
- synchondroses
- symphyses
Synchondroses
immobile; bones joined by hyaline cartilage; found connecting the ribs to the sternum
Symphyses
resist compression and act as shock absorbers; allow slight mobility; pads of fibrocartilage between articulating bones; found in the pubic symphysis and in between vertebrae
Synovial joints
- bones separated by a joint cavity
- include most joints in the body
- diarthrosis
examples: - elbow
- knee
- ankle
Basic features of synovial joints
- articular capsule and joint cavity
- synovial fluid
- articular cartilage
- ligaments, nerves, and blood vessels
What is the relationship between mobility and stability?
they are inversely related; the more mobile a joint, the less stable it is and the more stable, the less mobile it is