joints Flashcards

1
Q

Articular fat pads

A

cushion btwn fibrous layer of capsule (intracapsular) and the synovial membrane (extra-articular)

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2
Q

Articular disks

A
  • fibrocartilage

- stabilize articular surfaces to improve the fit of the bone ends, stablilize joint, reduce wear and tear

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3
Q

tendon sheath

A

elongated bursa that wraps around tendons

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4
Q

bursa

A
  • outside joint capsule
  • flattened fibrous sacs
  • synovial membranes and filled with synovial fluid
  • act as ball bearingswhere ligaments muscles tendons and bones rub together
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5
Q

3 stabilizing factors of synovial joints

A

1) shape of articular surface
2) ligamentnumber and location
3) muscle tone (keeps tendons taught across joints

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6
Q

how many types of synovial joints

A

6 types, based onshape of articular surfaces

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7
Q

synovial joints: plane joint

A

carpels and metacarpels
flat articular surfaces
gliding non axial movement

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8
Q

synovial joints: hinge joints

A

cylinder and trough
humerous and ulna
flexion and extension uni-axial movement

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9
Q

synovial joints: pivot joint

A

sleeve and axle
radius and ulna
uniaxial movement: rotation

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10
Q

synovial joints: condylar joint

A

one concave one convex (oval shaped)
btwn metatarsals and phalanges
biaxial movement: (flexion and extension) (abduction and adduction)

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11
Q

synovial joints: saddle joints

A

concave and convex (saddle shaped)
btwn tapezium and metacarpal
biaxial movement: (flexion and extension) (abduction and adduction)

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12
Q

synovial joints: Ball and socket joints

A
  • cup and spherical head
  • shoulder and hip joints
  • multiaxial movement: (flexion and extension) (abduction and adduction) (rotation)
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13
Q

TMJ (temporalmandibular joint)

A
  • temporal fossa
  • articular tubercle
  • mandibular condyle
  • articular capsule thickens into strong lateral ligaments
  • most easily dislocated joint in body
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14
Q

how fix TMJ dislocation

A

roll syringe back

reem it

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15
Q

Hip (coxal) joint

A
  • ball and socket
  • acetabular labrum - enhances depth of socket
  • head of femur articulates with acetabulum
  • good range of mvmnt but limited by depth of pocket (but makes much harder to dislocate = stable)
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16
Q

hip joint ligaments

  • 4
  • what one not stab
A

illiofemoral ligament
pubofemoral ligament
ishiofemoral ligament

ligament of the head of the femur
-ligamentum teres
+dosent stabilize
+ brings in BVs to head of femur

17
Q

glenohumoral joint (shoulder)

A
  • ball and socket
  • stab sacrificed for mvmnt
  • slightly deepend rim of fibrocartilage (glenoid labrum) improves fit
18
Q

glenohumoral joint (shoulder) reinforcing ligaments

A

coracohumoral ligament - helps support weight of upper limb

3 glenohumoral ligaments (upper middle inferior) form somewhat weak anterior reinforcements

19
Q

glenohumoral joint (shoulder): reinforcing muscle tendons

A

tendon of the long head of the biceps

tendons of the rotator cuff

20
Q

knee joint

A

largest and most complex joint of the body

3 joints
1) femoral patellar (gliding motion during knee flexion)

2&3) lateral and medial tibiofemoral joints

+btwn femoral condyles and lateral and medial minisci of the tibia
+flexion, extension, some rotation when knee partially flexed

21
Q

largest and most complex joint of body

A

knee joint

22
Q

knee joint capsule

A
  • reinforced by muscle tendons

- absent anteriorly

23
Q

what helps prevent movement at knee joint

A

capsular and extracapsular ligaments help prevent movement at knee joint

24
Q

anteriorly at the knee joint the quadriceps tendon gives rise to:

A
  • lateral and medial patellar retinacula

- patellar ligamnet

25
Q

Knee joint: oblique popliteal ligament

A

stabilizes posterior knee joint

26
Q

Knee joint: Fibular collateral ligament (lateral collateral ligament)

A

prevent rotation when knee is extended

27
Q

Knee joint: arcuate popliteal ligament

A

reinforces joint capsule posterior

28
Q

Knee joint: tibial collateral ligament (medial collateral ligament)

A

prevent rotation when knee extended

29
Q

medial collateral ligament closely associate with meniscus

A

tear MCL likely tear meniscus

30
Q

Anterior cruciate ligament and posterior cruciate ligament

A
  • during knee movement ACL prevents anterior sliding of tibia, PCL prevents posterior sliding of tibia
  • knee fully extended, ACL and PCL are taught, knee is locked