Test 4: Knee

Question 1

Largest joint in the body
Very complex
Primarily a hinge joint

Answer 1

Knee joint

Question 2

Bears most of your weight

Answer 2

Tibia- medial

Question 3

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

Answer 3

Fibula- lateral

Question 4

Sesamoid (floating) bone

Answer 4

Patella

Question 5

Where is the patella imbedded in?

Answer 5

Tendon & patellar ligament

Question 6

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

Answer 6

Patella

Question 7

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

Answer 7

Tibiofemoral joint

Question 8

• Arthrodial classification

* Gliding nature of patella on femoral condyles

Answer 8

Patellofemoral joint

Question 9

________ provide static stability.

Answer 9

Ligaments

Question 10

__________ & _____________ contractions produce dynamic stability

Answer 10

Quadriceps

Hamstring

Question 11

• Attached to tibia
• Deepen tibial fossa
• Enhance stability

Answer 11

Meniscus

Question 12

Tears in menisci occur due to:

Answer 12

Compression & shear forces

Question 13

______ on lateral surface and _______ on medial side

Answer 13

Thick

Thin

Question 14

Menisci tears happen from:

Answer 14

Planting and rotating

Shearing

Question 15

ACL plays a role in:

Answer 15

Rotary movement

Question 16

One of the most common serious injuries to knee

Answer 16

ACL (Anterior cruciate ligament)

Question 17

PCL (Posterior cruciate ligament) prevents:

Answer 17

Posterior tibial translation

Question 18

Lateral collateral ligament (LCL)

Answer 18

Infrequently injured

Question 19

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

Answer 19

Medial copllateral ligament (MCL)

Question 20

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

Answer 20

Synovial cavity

Question 21

• Just posterior to patellar tendon

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

Answer 21

Infrapatellar fat pad

Question 22

Knee sprain=

Answer 22

capsule strain

Question 23

Knee extends to:

Answer 23

Extends to 180°(0° of flexion)

Hyperextension of 10° or > not uncommon

Question 24

Knee flexes to:

Answer 24

Flexion occurs to about 140°

With knee flexed 30° or >

Question 25

Flexed knee internal and external rotation:

Answer 25

* Internal rotation 30° occurs | * External rotation 45° occurs

Question 26

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

Answer 26

"Screw homes"

Question 27

Origin of the vastus lateralis:

Answer 27

Lateral lip of linea aspera, gluteal tuberosity and greater trochanter

Question 28

Insertion of the vastus lateralis:

Answer 28

Tibial tuberosity (via the patella and patellar ligament)

Question 29

Action of the vastus lateralis:

Answer 29

Extend the knee | • Tibiofemoral joint

Question 30

Origin of the vastus intermedius:

Answer 30

Anterior and lateral shaft of the femur

Question 31

Insertion of the vastus intermedius:

Answer 31

Tibial tuberosity (via the patella and patellar ligament)

Question 32

Action of the vastus intermedius:

Answer 32

Extend the knee | • Tibiofemoral joint

Question 33

Origin of the vastus medialis:

Answer 33

Medial lip of the linea aspera

Question 34

Insertion of the vastus medialis:

Answer 34

Tibial tuberosity (via the patella and patellar ligament)

Question 35

Action of the vastus medialis:

Answer 35

Extend the knee | • Tibiofemoral joint

Question 36

Fuctions to decelerate your leg

Answer 36

Quadriceps

Question 37

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

Answer 37

25% to 33%

Question 38

Origin of the popliteus:

Answer 38

Lateral condylae of the femur

Question 39

Insertion of the popliteus:

Answer 39

Proximal, posterior aspect of tibia

Question 40

Action of the popliteus:

Answer 40

Medially rotate the knee | • Flex the knee

Question 41

Origin of the gastrocnemius:

Answer 41

Posterior condyles of the femur

Question 42

Insertion of the gastrocenemius:

Answer 42

Calcaneus via calcaneal tendon

Question 43

Action of the gastrocnemius:

Answer 43

* Flex the knee | * Plantar flex the ankle