LOWER LIMB INJURIES Flashcards Preview

ORTHOPEDICS AND RHEUMATOLOGY > LOWER LIMB INJURIES > Flashcards

Flashcards in LOWER LIMB INJURIES Deck (24):
0

What does varus displacement mean?

Displacement towards the midline

1

What does valgus displacement mean?

Deviation away from the midline

2

What is the main function of the lateral collateral ligament?

Restraint in varus angulation
Provides restraint with the MCL to axial rotation

3

When is the lateral collateral ligament tight?

During extension

4

What is the degree of external rotation that the knee allows?

About 10 degrees

5

What is in the first layer of the lateral structures of the knee?

Iliotibial tract
Biceps femoris

6

What is in the second layer of the lateral structures of the knee?

Patellar retinaculum
Patellofemoral ligament

7

What is in the third layer of the lateral structures of the knee? (Name 8 structures)

Lateral collateral ligament
Fabellofibular ligament
Lateral geniculate artery
Arcuate ligament
Coronary ligament
Popliteus tendon
Popliteo fibular ligament
Capsule

8

What is in the first layer of the medial structures in the knee?

Sartorius
Patellar retinaculum

9

What is in the second layer of the medial structures in the knee?

Semimembranosus
Superficial medial collateral ligament
Posterior oblique ligament

10

What is in the third layer of the medial structures in the knee?

Deep MCL
Capsule
Coronary ligament

11

What is the primary function of the anterior cruciate ligament?

Resist anterolateral displacement of the tibia on the femur

12

What is the secondary function of the anterior cruciate ligament?

Resist varus displacement at 0 degrees of flexion

13

What is the origin of the ACL?

Posteromedial corner of medial aspect of lateral femoral condyle in the intercondylar notch.

14

What is the insertion of the ACL?

Anterior to the intercondyloid eminence of the tibia

15

What are the two bundles that make up the anterior cruciate ligament?

Anterior medial bundle
Posterior lateral bundle

16

What is the blood supply to the anterior cruciate ligament?

Medial geniculate artery

17

What is the nerve that innervates the ACL?

Articular branches of the tibial nerve

18

What is the collagen composition of the ACL?

90% type I
10% type III

19

What is the primary function of the posterior cruciate ligament?

Prevent posterior translation of the tibia relative to the femur
Posterolateral rotatory instability

20

What is the secondary function of the PCL?

Resists varus displacement in 0 degrees of flexion

21

Where does the posterior cruciate ligament originate?

Medial femoral condyle

23

Where does the PCL insert?

Tibial sulcus
Medial intercondylar ridge
(Finish this)

24

What are the two bundles that make up the posterior cruciate ligament?

Anterior lateral bundle
Posterior medial bundle