MS exam I joints and hip ligs

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shmvii
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170934
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MS exam I joints and hip ligs
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2012-09-28 19:00:43
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MS exam joints hip ligs
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MS exam I joints and hip ligs
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  1. transverse acetabular ligament
    bridges the gap in the acetabular labrum, but leaves space underneath itself so vessels can pass under
  2. ligamentum teres of the femur
    • aka round ligament
    • runs from fovea to either side of acetabular notch
    • protected by fat
    • doesn't play much of a mechanical roll
    • the acetabular branch of the obturator artery runs thru it, supplying some blood to head of femur
  3. zona orbicularis
    • a ligament on the neck of the femur formed by the circular fibers of the articular capsule of the hip joint
    • surrounds the head and runs down like a noose around the head and neck, hourglass shaped
    • narrower than the head
    • function: acts biomechanically as a locking ring wrapped around the femoral neck
    • and thus is a key structure for hip stability in distraction
  4. iliofemoral ligament aka lig of Bertin aka Y ligament
    attachments 
    lower AIIS and rim of acetabulum to entire length of trochanteric line
  5. iliotrochanteric band
    • superior portion of the iliofemoral ligament
    • limits extension and adduction
    • runs down to upper part of intertrochanteric line
  6. pubofemoral lig attachments
    • creates the bottom part of the Z with the Y lig
    • med: ant of iliopubic eminence, sup ramus of pubic bone, and obturator crest
    • lat: ant surface of trochanteric fossa

    limits: extension and abduction and ER
  7. ischiofemoral lig  - attachments and what it limits
    • post: post surface of the acetabular rim and labrum ---> sup/lat:  inner surface of greater trochanter ant to trochanteric fossa
    • limits: extension, abduction, medial rot
  8. ligaments that limits femur ER
    (anterior lig,) iliofemoral lig, pubofemoral lig
  9. lig that limits femer IR
    ischiofemoral
  10. ligs that prevent femur abduction
    • pubofemoral and ischiofemoral
    • and info part of iliofemoral lig
  11. lig that limits adduction in femor
    iliotrochanteric lig (that's the sup part of the iliofemoral lig)
  12. anatomically simple joint
    anatomically compound joint
    anatomically complex joint
    • simple - just 2 bones articulating
    • compound - more than 2 bones
    • complex - has meniscus
  13. mechanically simple joint
    mechanically complex joint
    • simple - has axis at right angle
    • complex - axis not at right angle
  14. unmodified ovied joint
    • spheroid surface w 3 axis and 3 degrees of freedom
    • ball and socket joint
  15. modivied ovoid joint
    • ellipsoidal
    • 2 axis and 2 degrees of freedom (no rotation)
    • condylar
    • ex. MCP joint
  16. unmodified sellar joint
    • saddle joint
    • 2 axis and 2 degrees of freedom
    • concave in 1 dir, convex in other
    • ex. 1st CMC
  17. modifiled sellar joint
    • hinge
    • 1 axis and 1 degree of freedom
    • ex. elbow
  18. trochoid joint
     A joint in which a section of a cylinder of one bone fits into a corresponding cavity on the other, as in the proximal articulation between the radius and ulna.
  19. synarthroses joints
    • have no genuing joint space
    • no fluid
    • bones are divided by tissue
    • 3 types: syndesmosis, synchondrosis, synostosis
  20. syndesmosis
    • type of synarthosis joint
    • fibrous tissue between bones
    • ex - distal tib-fib joint
  21. synchondrosis joint
    • type of synarthrosis joint
    • cartilagenous tissue btwn bones
    • ex: costochondral joint
  22. synostosis joint
    • type of synarthorsis joint
    • bony tissue btwn bones (so it's really bone on bone)
    • ex - bony sutures in skull
  23. diarthroses joints, 2 types
    • symphyses - connecting tissue partly fills the joint  ex-pubic sympysis
    • synoviales - moveable joints with all the characteristics of synovial joints
  24. 2 types of synovial joints
    • amphiarthroses <10 degrees of movement
    • articulations >10 degrees of movement
  25. spin bone motion
    pure rotation around a mechanical axis
  26. swing bone motion, 2 types
    • any movement other than pure spin
    • pure or cardinal swing - the shortest route btwn 2 points
    • arcuate or impure swing - a longer route; rotation added to swing
  27. osteokinematics
    arthrokenematics
    • movement of the long bone
    • movement in the joint
  28. gliding or sliding in arthrokenematics
    • one point on a moving survace comes in contact w new points on another surface
    • (picture your knuckles dragging across your other palm)
  29. rolling in arthrokenematics
    • new points on one surface come in contact with new points on another surface
    • (picture knuckles of each fist rolling against each other)
  30. translation (or gliding) in arthrokenematics
    an arc surface slides over another surface w/o adding another component (like sliding/gliding, but over a curved surface)
  31. angulation in arthrokenematics
    increase or decrease in the angle formed btwn 2 adjacent bones (ex. valgus + varus in knee)
  32. iliofemoral lig's 3 parts
    • sup: horizontal, called illiotrochanteric band
    • middle:  is weak
    • inf: oblique, inserts into lower trochanteric line
  33. iliofemora lig restricts what?
    • ext
    • ER
    • adduction (the iliotrochanteric band)
    • abduction (only the inf part)
  34. pubofemoral lig limits what?
    • abd 
    • ext
    • ER
  35. orientation of fibers of ischiofemoral lig
    spirals superolat over neck of femur from post acetabulum to greater trochanter

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