anatomy exam 3

anatomy exam 3 - Classifications of joints: Structural...

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Classifications of joints: Structural classification based upon: presence of space between bones and type of connective tissue holding bones together: (1) collagen fibers (2) cartilage (3) joint capsule & accessory ligaments -Functional classification based upon movement: Synarthrosis : don’t move at all; immovable joint amphiarthrosis : can move slightly diarthrosis : move freely; all are synovial joints, variety of shapes and permit several different types of movement ligament: when the fibers of the fibrous capsule of an articular capsule are arranged in parallel bundles fibrous joint: Lack a synovial cavity; Bones held closely together by fibrous connective tissue-rich in collagen fibers; Little or no movement; 3 structural types: sutures : synarthrotic-virtually immovable; Thin layer of dense fibrous connective tissue unites bones of the skull; synarthrosis-Immovable, irregular interlocking edges give added strength and decrease chance of fracturing, ex. Frontal suture syndesmoses : amphiarthrotic; Fibrous joint; bones united by ligament; Slightly movable; Anterior tibiofibular joint and Interosseous membrane, greater distance between the articular bones and more dense fibrous CT than in a suture, arranged as a bundle or sheet, ex. Distal tibiofibular joint gomphoses : synarthrotic; Ligament holds cone-shaped peg in bony socket; Immovable ; Teeth in alveolar processes of maxillae and mandible Cartilaginous joint: Lacks a synovial cavity; articulating bones united by cartilage, allows little or no movement; Bones tightly connected by fibrocartilage or hyaline cartilage; 2 types: synchondroses : synarthrotic (i.e. ribs and sternum); Connecting material is hyaline cartilage; Immovable, ex. epiphysealplate symphyses : amphiarthrotic; connecting material is broad flat disc of fibrocartilage (i.e. interfetebral disk, joining of hip bones, pubic symphysis occur in midline of the body); Fibrocartilage is connecting material; Slightly movable, also found at the junction of manubrium and body of sternum, ends of articular bones are covered with hyaline cartilage Intervertebral- between vertebral bodies and between vertebral arches, cartilaginous between vertebral bodies and synovial between vertebral arches, flexion, extension, lateral flexion, and rotation of vertebral column Sternocostal- between sternum and first seven pairs of ribs, cartilaginous between sternum and first pair of ribs and synovial between sternum and second through seventh pair of ribs, synarthrosis between sternum and first pair of ribs, and diarthrosis between sternum and second through seventh pairs of ribs Lumbosacral- between body of fifth lumbar vertebra and base of sacrum and between inferior articular facets of fifth lumber vertebra and superior articular facets of first vertebra of sacrum, cartilaginous between body and base and synovial between articular facets, amphiarthrosis between body and base and diarthrosis between articular facets, flexion, extension, lateral flexion, and rotationof vertebral column
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This note was uploaded on 06/25/2008 for the course KIN 2501 taught by Professor Hargroder during the Spring '08 term at LSU.

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anatomy exam 3 - Classifications of joints: Structural...

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