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Classification of Joints

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Classification of Joints

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Classification of Joints

  1. 1. CLASSIFICATION OF JOINTS
  2. 2. CLASSIFICATION OF JOINTS:  I) SYNARTHROSIS  - no movement  - immovable joint  - bony edges are quite close together and may even interlock.
  3. 3.  a) Fibrous 1. Suture – interlocked, bound by dense connective tissue (skull). 2. Gomphosis – fibrous connection - ligaments binds the tooth within the alveolus (roots of teeth with alveolae).
  4. 4.  b) Cartilaginous  1. Synchondrosis – connecting medium is cartilage ( petroccipital, sphenoccipital & sternocostal joint).
  5. 5.  II) AMPHIARTHROSIS  - little movement/  - slightly movable joints  - bone usually farther apart
  6. 6.  a) Fibrous  1. Syndesmosis – connected by ligament ( tibia & fibula). b) Cartilaginous 2. Symphysis – bones separated by a broad disc or pad of fibrocartilage (between right & left pelvis, mandible, between adjacent vertebrae of the spinal column).
  7. 7.  III) DIARTHROSIS  - synovial joints  - freely movable joints  - wide range of motion Synovial – complex joint bounded by joint capsule & containing synovial fluid. - subdivided according to the types; or ranges of movement permitted .
  8. 8. FUNCTIONAL CLASSIFICATION OF SYNOVIAL JOINTS: 1. Gliding - flattened or slightly curved faces. - two opposing surfaces slide past one another.
  9. 9. 2. Hinge - permit angular movement in a single plane. - opening & closing of door
  10. 10. 3. Pivot - permit only rotation. - left to right head rotation - pronation & supination of palm
  11. 11. 4. Ellipsoidal - oval articular face nestles within a depression on the opposing surface. - angular motion occurs in two planes, along or across the length of the oval.
  12. 12. 5. Saddle - concave on one axis and convex on the other & the opposing faces nest together.
  13. 13. 6. Ball & Socket - round head of one bone nests within a cup-shaped depression in another. - all combinations of movement circumduction & rotation.

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