MSK - The Popliteal Fossa Flashcards Preview

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Flashcards in MSK - The Popliteal Fossa Deck (23):
1

What shape is the popliteal fossa and where is it found?

Diamond Shaped

Found on the posterior side of the knee

2

What are the names of the four borders of the popliteal fossa?

Superiomedial Border

Superiolateral Border

Inferiomedial Border

Inferiolateral Border

3

What makes up the superiomedial border of the popliteal fossa?

Semimembranosus

4

What makes up the superiolateral border?

The biceps femoris

5

What makes up the inferiomedial border?

Medial Head of the Gastrocnemius

6

What makes up the inferiolateral border?

Lateral head of the Gastrocnemius and Plantaris

7

What makes up the floor of the popliteal fossa?

Formed by the posterior surface of the knee joint capsule and by the posterior surface of the femur

8

What is the roof of the popliteal fossa made of?

2 Layers

Popliteal Fascia

Skin

9

What are the contents of the popliteal fossa?

A good way of remembering the contents of the popliteal fossa from medial to lateral is by using the mnemonic "Serve And Volley Net Balls"

Semimembranosus (medial border)

Popliteal Artery

Popliteal Vein

Tibial Nerve

Common Fibular Nerve

Biceps Femoris (lateral border)

 

10

What are the most superficial contents of the popliteal fossa?

Tibial and Common Fibular Nerves

They are both branches of the sciatic nerve

11

What vein empties into the popliteal vein at the popliteal fossa?

The small saphenous vein 

12

 What is the deepest structure of the popliteal fossa?

The popliteal artery

13

What are the two major causes of an appearance of a mass in the popliteal fossa?

Bakers Cyst

Aneurysm of the popliteal artery

14

What is Bakers Cyst?

How does this usually arise?

What could happen that would cause complications?

Inflammation and swelling of the semimembranosus bursa

Usually arises in conjunction wih arthritis of the knee 

Usually selve resolves

Cyst can rupture and produce symptoms similar to deep vein thrombosis.

15

What is an aneurysm?

Why does a popliteal artery aneurysm have consequences for other contents of the popliteal fossa?

A dilation of an artery, which is greater than 50% of the normal diameter

The popliteal fascial layer (the roof of the popliteal fossa) is tough and non extensible

16

What is particularly susceptible to compression from the popliteal artery?

How would this clinically present?

The Tibial Nerve

Leg anethesia or a loss of leg motor function

17

How can an aneurysm of the popliteal artery be detected?

Obvious palpable pulsation in the popliteal fossa with abnormal arterial sounds

18

What are some other causes of a popliteal mass in the popliteal fossa?

Deep Vein Thrombosis

Adventitial Cyst of the Popliteal Artery

Various Neoplasms (such as rhabdomyosarcoma)

19

What is represented by the purple highlighted area?

Semimembranosus

20

What is represented by the area highlighted in green?

Biceps Femoris

21

What is represented by the area highlighted in blue?

Plantaris

22

What is represented by the area highlighted in brown?

Medial head of gastrocnemius

23

What is represented by the area highlighted in orange?

Lateral head of gastrocnemius