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Jnt Classifications
| Question | Answer |
|---|---|
| Functional Classifications | 1) synarthroses (fibrous joints) 2) amphiarthroses (cartilaginous joints) 3) diarthroses (synovial joints) |
| Describe what synarthroses is | bones united by fibrous tissue and are nonsynovial. Movement dependent on length of fibers |
| Joint that has minimal to no movement | Fibrous (synarthroses) |
| Name the 3 types of fibrous joints | 1. suture (sagittal suture of skull) 2. syndesmosis (tibia and fibula with interosseous membrane) 3. gomphosis (tooth in its socket) |
| Describe a suture | Fibrous joint; immovable; eventual fusion termed synostosi |
| Describe syndesmosis | bone connected to bone by dense fibrous membrane; very little motion; fibrous joint |
| Describe gomphosis | fibrous joint; two bony surfaces connect as a peg in a whole; teeth and corresponding sockets in the mandible/maxilla are the ONLY gomphosis joint in body; periodontal membrane is the fibrous component of the joint |
| What is synostosis | eventual fusion of a joint |
| What are the different types of cartilaginous joints | synchondrosis (sternum and true rib articulation) symphysis (pubic symphysis) |
| Describe cartilaginous joints | have a hyaline cartilage or a fibrocartilage connecting one bone to another. Slightly moveable. |
| describe synchondrosis | example is sternum and true rib articulation has hyaline cartilage; cartilage adjoins 2 ossifying centers of bone; provides stability during growth; may ossify to a synostosis once growth is completed; slight movement |
| describe symphysis joint | cartilaginous joint; example is pubic symphysis; generally located at the midline of the body; 2 bones covered with hyaline cartilage; 2 bones connected by fibrocartilage; slight motion |
| what are the different types of diarthroses joints | uniaxial biaxial multiaxial |
| Which joint has fee movement | diarthroses (synovial) |
| What are the 5 distinguishing characteristics of a diarthroses (synovial) joint | 1. joint cavity 2. articular cartilage 3. synovial membrane 4. synovial fluid 5 fibrous capsule |
| Which joints are classified by the type of movement and by the shape of articulating bone | synovial joints (diarthroses) |
| what is a uniaxial joint | 1 motion around a single axis in 1 plane of the body |
| Which joint is a hinge (ginglymus) joint | Uniaxial synovial joint example: elbow joint |
| Which joint is a pivot (trochoid) joint | uniaxial synovial joint example: atlantoaxial joint |
| Which joint is a condyloid joint | Biaxial synovial joint example: MCP |
| which joint is a saddle joint | biaxial synovial joint example: CMP |
| what is a biaxial joint | movement occurs in 2 planes, around 2 axes through concave/convex surfaces |
| what is a multi-axial joint | synovial movement occurs in 3 planes around 3 axes |
| What are 2 examples of a multi-axial joint | plane (gliding) - carpal joints ball and socket - hip joint |
Created by:
robon13
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