Articular system

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Articular system
2012-03-30 21:48:48
functional anatomy

Show Answers:

  1. What is a connection between 2 bones?
  2. What are the functions of a joint?
    • allows motion
    • bears weight
    • provides stability
    • contains synovial fluid (lubricates jt, nourishes cartilage)
  3. What is a fibrous joint?
    thin layer of fibrous peroisteum betweenm 2 bones
  4. What are the three types of fibrous joints?
    • synarthrosis
    • syndesmosis
    • gomphosis
  5. What is a suture joint called?

    sutures in skull
  6. What is a ligamentous joint called?

    distal tibiofibular, distal radioulnar
  7. What is a peg-in-socket joint?

    bolted together - tooth in dental socket
  8. What is a cartilaginous joint called?
  9. What are the characteristics of an amphiarthrodial joint?
    • -hyaline or fibrocartilage between 2 bones
    • -allows sm. amt. of mvmt (bending, twisting, compression)
    • -provides great deal of stability

    • symphysis pubis - fibrocartilage
    • verterbrae, 1st sternocostal jt - hyaline
  10. What is another name for synovial joint?
    diarthrodial joint
  11. What are the characteristics of a diarthrodial joint?
    • -no direct union between bone ends (allows free motion)
    • -components: cavities filled with synovial fluid, articular surface smooth (covered with hyaline or articular cartilage)

    hip, elbow, knee
  12. What are the 4 types of synovial joints?
    • nonaxial
    • uniaxial
    • biaxial
    • triaxial (multiaxial)
  13. What type of synovial joint is considered a plane joint/irregular, has only linear mvmt, gliding motion, the joint surfaces are flat (intercarpals)?
  14. What type of synovial joint has 1 axis/1 plane,and hinges or pivots (elbow, c1/c2)?
  15. What type of synovial joint has 2 axes/2 planes, and is condyle (ellipsoidal) or saddle (MCP, CMC)?
  16. What type of synovial joint has 3 axes/3 planes, is a ball and socket, and is least stable (hip and shoulder)?
  17. What are ligaments?
    • hold bones together
    • -bands of fibrous CT
    • -provides attachement for cartilage,fascia, and muscle
    • -flexible, but not elastic
    • -allows jt mvmt
    • -capsular ligaments surround and protect jts
  18. What is a jt capsule?
    • surrounds and encases a jt
    • -protects articular surfaces of bone
    • -2 layers
  19. What lubricates articular cartilage, is used for shock absorption, nutrition and decreases friction?
    synovial fluid
  20. What is the dense, fibrous CT that can withstand a great amt of pressure and tension?
  21. what are the 3 types of cartilage?
    • hyaline
    • fibrocartilage
    • elastic
  22. What type of cartilage is found at the end of opposing bones, has a smooth surface, no blood or nerve supply, and gets nutrition from synovial fluid?
    hyaline (articular)
  23. What type of cartilage is for shock absorption, and is important in weight bearing joints?

    menisci in knee, disc between sternum, clavicle, labrum, interverterbal disc
  24. What type of cartilage has a certain amt of motion, and provides shape?

    symphysis pubis, larynx, external ear
  25. What attaches muscle to bone?
  26. What do you find in areas where tendons are subject to a lot of pressure or friction (acts as protection)?
    tendon sheath
  27. What is an aponeurosis?
    • tendon sheath
    • -broad, flat tendon sheath
    • -found where muscles attach to bone

    in wrist, foot, lattisimus dorsi, linea alba (abs)
  28. What is a small padlike sac in areas of excessive friction?

    under tendons or over bony prominences

    olecranon bursa, students bursa
  29. What plane divides the body into right and left?
    sagittal plane

    flexion and extention occur here
  30. What plane divides the body into front and back?
    frontal plane

    abduction and adduction occur here
  31. What plane divides the body into top and bottom?
    transverse plane

    rotation occurs here
  32. What plane passes through the midline of a part?
    cardinal plane
  33. What do you find at the intersection of all three planes?
  34. What is an axis?
    point that runs through the center of the joint around which a part rotates

    joint mvmt occurs in an axis that is always perpendicular to its plane
  35. What axis runs from front to back? What plane is it associated with?
    sagittal axis

    frontal plane
  36. What axis runs from side to side? What plane is it associated with?
    frontal axis

    sagittal plane
  37. What axis runs from top to bottom? What plane is it associated with?
    vertical axis (longitudinal)

    transverse plane