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KIN245 > Test 4: Knee > Flashcards

Test 4: Knee Flashcards

1
Q

Largest joint in the body
Very complex
Primarily a hinge joint

A

Knee joint

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2
Q

Bears most of your weight

A

Tibia- medial

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3
Q
  • Serves as the attachment for knee joint structures
  • Does not articulate with femur or patella
  • Not part of knee joint
A

Fibula- lateral

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4
Q

Sesamoid (floating) bone

A

Patella

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5
Q

Where is the patella imbedded in?

A

Tendon & patellar ligament

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6
Q

Serves similar to a pulley in improving angel of pull, resulting in greater mechanical advantage in knee extension

A

Patella

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7
Q

Ginglymus joint
• Sometimes referred to as trochoginglymus joint internal & external rotation occur during flexion
• Some argue for condyloid classification

A

Tibiofemoral joint

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8
Q
  • Arthrodial classification

* Gliding nature of patella on femoral condyles

A

Patellofemoral joint

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9
Q

________ provide static stability.

A

Ligaments

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10
Q

__________ & _____________ contractions produce dynamic stability

A

Quadriceps

Hamstring

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11
Q
  • Attached to tibia
  • Deepen tibial fossa
  • Enhance stability
A

Meniscus

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12
Q

Tears in menisci occur due to:

A

Compression & shear forces

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13
Q

______ on lateral surface and _______ on medial side

A

Thick

Thin

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14
Q

Menisci tears happen from:

A

Planting and rotating

Shearing

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15
Q

ACL plays a role in:

A

Rotary movement

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16
Q

One of the most common serious injuries to knee

A

ACL (Anterior cruciate ligament)

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17
Q

PCL (Posterior cruciate ligament) prevents:

A

Posterior tibial translation

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18
Q

Lateral collateral ligament (LCL)

A

Infrequently injured

19
Q
  • Maintains medial stability by resisting valgus forces or preventing knee from being adducted
  • Injuries occur commonly, particularly in contact or collision sports
A

Medial copllateral ligament (MCL)

20
Q
  • Supplies knee with synovial fluid
  • Lies under patella and between surfaces of tibia & femur
  • “Capsule of the knee”
A

Synovial cavity

21
Q
  • Just posterior to patellar tendon

* An insertion point for synovial folds of tissue known as “plica”

A

Infrapatellar fat pad

22
Q

Knee sprain=

A

capsule strain

23
Q

Knee extends to:

A

Extends to 180°(0° of flexion)

Hyperextension of 10° or > not uncommon

24
Q

Knee flexes to:

A

Flexion occurs to about 140°

With knee flexed 30° or >

25
Q

Flexed knee internal and external rotation:

A
  • Internal rotation 30° occurs

* External rotation 45° occurs

26
Q

When hyperextending knee, your knee externally rotates to almost lock your knee

A

“Screw homes”

27
Q

Origin of the vastus lateralis:

A

Lateral lip of linea aspera, gluteal tuberosity and greater trochanter

28
Q

Insertion of the vastus lateralis:

A

Tibial tuberosity (via the patella and patellar ligament)

29
Q

Action of the vastus lateralis:

A

Extend the knee

• Tibiofemoral joint

30
Q

Origin of the vastus intermedius:

A

Anterior and lateral shaft of the femur

31
Q

Insertion of the vastus intermedius:

A

Tibial tuberosity (via the patella and patellar ligament)

32
Q

Action of the vastus intermedius:

A

Extend the knee

• Tibiofemoral joint

33
Q

Origin of the vastus medialis:

A

Medial lip of the linea aspera

34
Q

Insertion of the vastus medialis:

A

Tibial tuberosity (via the patella and patellar ligament)

35
Q

Action of the vastus medialis:

A

Extend the knee

• Tibiofemoral joint

36
Q

Fuctions to decelerate your leg

A

Quadriceps

37
Q

Generally quads are desired to be _____________ stronger than hamstring group.

A

25% to 33%

38
Q

Origin of the popliteus:

A

Lateral condylae of the femur

39
Q

Insertion of the popliteus:

A

Proximal, posterior aspect of tibia

40
Q

Action of the popliteus:

A

Medially rotate the knee

• Flex the knee

41
Q

Origin of the gastrocnemius:

A

Posterior condyles of the femur

42
Q

Insertion of the gastrocenemius:

A

Calcaneus via calcaneal tendon

43
Q

Action of the gastrocnemius:

A
  • Flex the knee

* Plantar flex the ankle

KIN245 (14 decks)

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