CHAPTER 9 “ Joints”. COMMON COURSE OBJECTIVES: Joints: Structural and functional classification Structure of a typical synovial joint Types of synovial joints Terms for descriptions of movements. JOINTS. Defined: any place where two bones come together General Function of Joints:
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COMMON COURSE OBJECTIVES:
Joints: Structural and functional classification
Structure of a typical synovial joint
Types of synovial joints
Terms for descriptions of movements
- Hold the skeleton together
- Allow for increased mobility and flexibility of skeleton
-function(what kind of movement they allow)
-structure(what material is found in the joint and if is there a joint cavity present).
The most common type of functional joint in the body.
- sutures, gomphoses and syndesmoses.
- synchondroses, and symphyses.
Note that as mobility decreases, stability increases.
Examples: knee joint, elbow joint, shoulder and hip joints and the phalanges of hands and feet, etc.
7. Vessels - providenutrients to joint
1. gliding – - bony surfaces of bone slide or glide over each other
2. flexion –- bending movement that decreases the angle
3. extension – movement the increases the angle, opposite of lexion
4. abduction –moving away from longitudinal axis
5. adduction –movement toward the longitudinal axis
6. circumduction –movement of the limb such that it describes a cone
7. rotation – turning the bone or limb around its long axis
8.supination –rotating the forearm laterally such that the palm faces superiorly
9. pronation –- rotating the forearm medially such that the palm faces inferiorly
10. inversion –- sole of the foot faces or turns medially
11. eversion –- sole of the foot turn laterally
12. protraction –-juttting out of the jaw
13. retraction –- moving the jaw backward
14. elevation –- lifting the limb or body superiorly
15. depression –- moving the body part inferiorly
16. opposition –- to bring the thumb and index finger tips together
Opposition of thumb and pinky