leg and knee joint

Question 1

largest bone in body

Answer 1

femur

Question 2

neck of the femur

Answer 2

common site for proximal fractures

Question 3

2nd largest bone in body

Answer 3

tibia

Question 4

weight bearing bone and positioned medially

Answer 4

tibia

Question 5

long thin bone located laterally

Answer 5

fibula

Question 6

helps stabilize the ankle joint and mainly for muscular attachments/minimal weight bearing capacity

Answer 6

fibula

Question 7

largest synovial joint in body

Answer 7

knee joint

Question 8

knee is primarily a _____ synovial joint, although slight gliding, rolling and rotational movements occur

Answer 8

hinge type

Question 9

the knee is strong or weak

Answer 9

weak mechanical joint - so strengthened by supporting muscles and ligaments

Question 10

most important muscles for stabilizing the knee

Answer 10

quadriceps

Question 11

fibrous capsule that is strengthened and supported by several external ligaments of the knee joint

Answer 11

lateral collateral ligament LCL medial (tibial) collateral ligament MCL oblique and arcuate popliteal as well

Question 12

provide needed stability to the knee joint

Answer 12

ACL and PCL

Question 13

movement of the anterior cruciate ligament

Answer 13

slightly relaxed when knee is flexed- tight when the knee is fully extended

Question 14

ACL prevents the femur from sliding posterior on the tibia and helps prevent knee ____

Answer 14

hyperextension

Question 15

unhappy triad

Answer 15

disruption of ACL, medial meniscus, and MCL

Question 16

anterior drawer sign

Answer 16

Disruption of the ACL allows the tibia to be manually displaced anteriorly on the femur

Question 17

action of PCL

Answer 17

tightens during knee flexion (also tight in extension but not as tight)

to prevent femur from going anterior

Question 18

PCL prevents the the femur from _______ on the tibia

Answer 18

sliding anterior

PCL prevents posterior displacement of the tibia

Question 19

PCL rupture can occur from

Answer 19

• often occurs in auto accidents - dash hits front of tibia and pushes it posterior, tears or ruptures PCL
• when a person falls on the floor with knee flexed (basketball/volleyball)

Question 20

“posterior drawer sign”

Answer 20

When the PCL ruptures- the tibia can be manually displaced posteriorly on the femur

Question 21

Crescent shaped fibrocartilagenous plates on the superior articular surface of the tibia

Answer 21

menisci of the knee joint

Question 22

menisci act as ______ and help deepen the joint cavity

Answer 22

shock absorbers

Question 24

Menisci have limited ________ and heal poorly when injured- often require surgical repair/removal of injured region

Answer 24

blood supply

Question 25

how are menisci injured?

Answer 25

commonly during torsional twisting

Question 26

the medial meniscus is attached to the

Answer 26

MCL fibers

Question 27

muscular compartments of the leg

Answer 27

there are 4! anterior, lateral, superficial posterior and superficial deep

Question 28

Answer 28

Question 29

patellar retinaculum

Answer 29

Expansion of the quadriceps tendon surrounding the anterior aspect of the knee

Question 30

description of LCL

Answer 30

cord like

Question 31

description of MCL

Answer 31

band like

Question 32

ACL arises from the

Answer 32

anterior intercondylar area of the tibia

Question 33

PCL arises from the

Answer 33

posterior intercondylar area of the tibia

Question 34

ACL rupture is more or less common than PCL

Answer 34

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