03 Knee 2 Flashcards Preview

7202 Anatomy > 03 Knee 2 > Flashcards

Flashcards in 03 Knee 2 Deck (34):
1

From where can genu valgum arise? Genu varum?

- coxa vara
- coxa valga

2

Where does genu valga place stretch and compression forces?

- stretch on MCL
- compression on lateral compartment

3

What is seen in the feet with genu valga? Genu varum?

- pronation
- supination

4

Where are the compressive and stretch forces in genu varum?

- stretch on LCL
- compression on medial compartment

5

What are the ligaments of the knee?

- MCL (tibial)
- LCL (fibular)
- ACL
- PCL

6

What are the functions of the knee ligaments?

maintain congruity of femoral and tibial surfaces during flexion, extension, and rotation

7

Tension on the collateral ligaments in flexion

slack

8

Tension on the collateral ligaments in extension

taut

9

Which position of the knee carries a higher risk for injury?

- flexion
- ligaments are slack

10

Where is the common fibular nerve in relation to the fibular head and neck?

- posterior to the head
- inferior to fibular neck

11

Where is the tibial nerve in relation to the popliteal artery?

- superficial
- artery is on the femur, nerve not as deep

12

ACL attachments

- O: posteromedial aspect of lateral femoral condyle
- I: Anterior to the intercondyloid eminence of the tibia

13

PCL attachments

- O: anterolateral aspect of the medial femoral condyle
- I: Posterior tibia

14

Which muscles are attached to the calcaneus via the achilles tendon?

- gastrocnemius
- soleus

15

What are the deep muscles of the posterior compartment?

- flexors of the toes
- foot inverters

16

What are the muscles of the posterior lower leg innervated by?

tibial nerve, proximal branches

17

posterior supporting structures

- oblique popliteal ligament
- arcuate popliteal ligament
- semimembranosus over popliteus

18

supporting structures of the knee

lateral

- LCL
- popliteus tendon
- biceps femoris tendon
- IT band
- lateral patellar retinacular fibers

19

supporting structures of the knee

medial

- MCL
- medial patellar retinacular fibers
- pes anserine
- tendon of semimembranosus

20

Which ligament of the knee is stressed with quad action?

ACL

21

Which ligaments are stressed by hamstring action?

PCL

22

Quads protect the

PCL

23

Hamstrings protect

ACL

24

suprapatellar pouch

- part of the joint capsule
- holds a lot of fluid if there's an injury

25

functional knee flexion

70˚
(corresponds to stairs)

26

functional hip flexion

35-45˚

27

peroneal nerve neuropathies

traction

- prolonged squatting
- lithotomy positioning for prolonged periods as in childbirth

28

peroneal nerve neuropathies

trauma

- blunt trauma as well as open wounds
- fibular fractures or dislocations
- surgical procedures (i.e. arthroscopic or open knee procedures)

29

peroneal nerve neuropathies

compression

- lying with pressure on fibular head
- pressure wrapping around knee

30

peroneal nerve neuropathies

compression
- When is it common to lie with pressure on the fibular head for extended periods?

- coma
- anesthesia

31

peroneal nerve neuropathies

compression
- examples of pressure wrapping around the knee

- casts
- AFO
- compression stockings
- pneumatic splints

32

Who is particularly at risk for injury? (peroneal nerve neuropathies)

- diabetics
- others with polyneuropathies

33

What is the effect of prolonged (more than 20 minutes) cold applied to the knee?

produces irreversible injury to the common peroneal nerve at this point

34

symptoms of peroneal nerve neuropathies include

- complete or partial foot drop
- paresthesias or numbness on the anterolateral leg or dorsum of the foot
- mild, deep, "boring" pain around the lateral leg and knee may be reported