Lecture 6: Posterior Thigh and Popliteal Fossa Flashcards Preview

04. MSK Exam 2 Final > Lecture 6: Posterior Thigh and Popliteal Fossa > Flashcards

Flashcards in Lecture 6: Posterior Thigh and Popliteal Fossa Deck (40)
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1

What is the criteria for a muscle to be a "true" hamstring?

It must both flex the knee and extend the hip

2

What two "hamstring" muscles are not true hamstrings?

The hamstring portion of the adductor magnus (does not cross the knee)

The short head of the biceps femoris (does not cross the hip)

3

Where do all of the true hamstring muscles originate?

The ischial tuberosity

4

What is the innervation for the true hamstrings?

Tibial Branch of the Sciatic Nerve

5

Semitendinosus Muscle

What is its attachments?

Origin: Ischial Tuberosity

Insertion: Pes Anserinus (anteromedial aspect of superior tibia)

Posteromedial Aspect of thigh 

6

Semitendinosus Muscle

What is its action?

1. Extend Thigh

2. Flex Leg

3. Medially rotate flexed leg

7

Semitendinosus Muscle

What is its innervation and blood supply?

Innervation: Tibial Division of Sciatic Nerve

Blood Supply: Perforating branches of Deep Femoral Artery and Inferior Gluteal Artery

8

Semimembranosus Muscle

What is its attachments?

Origin: Ischial Tuberosity

Insertion: Posterior part of Medial Tibial Condyle 

-Distal tendon divides into two parts 

Posteromedial Aspect of thigh 

9

Semimembranosus Muscle

What is its action?

1. Extend Thigh

2. Flex Leg

3. Medially rotate flexed leg

10

Semitendinosus Muscle

What is its innervation and blood supply?

Innervation: Tibial Division of Sciatic Nerve

Blood Supply: Perforating branches of Deep Femoral Artery and Inferior Gluteal Artery

11

Long Head of Biceps Femoris Muscle

What is its attachments?

Origin: Ischial Tuberosity

Insertion: Lateral aspect of Fibular Head 

Posterolateral aspect of thigh 

12

Long Head of Biceps Muscle

What is its action?

1. Extend Thigh

2. Flex Leg

3. Laterally rotate flexed leg

13

Long Head of Biceps​ Muscle

What is its innervation and blood supply?

Innervation: Tibial Division of Sciatic Nerve

Blood Supply: Perforating branches of Deep Femoral Artery and Inferior Gluteal Artery

14

Short Head of Biceps Femoris Muscle

What is its attachments?

Origin: Lateral lip of linea aspera and lateral supracondylar line

Insertion: Lateral aspect of Fibular Head 

Posterolateral aspect of thigh 

15

Short Head of Biceps Muscle

What is its action?

1. Flex Leg

2. Laterally rotate flexed leg

16

Short Head of Biceps​ Muscle

What is its innervation and blood supply?

Innervation: Common Fibular Division of Sciatic Nerve

Blood Supply: Perforating branches of Deep Femoral Artery and Inferior Gluteal Artery

17

What three muscles insert to Pes Anserinus and what compartment do they belong to?

1. Sartorius Muscle (Anterior Compartment)

2. Gracilis Muscle (Medial Compartment)

3. Semitendinosus Muscle (Posterior Compartment) 

18

What ligament is Pes Anserinus superficial to?

Medial/tibial Collateral Ligament

19

What is Pes Anserine Bursitis?

Inflammation of anserine bursa between Pes Anserinus and MCL (due to overuse or trauma)

-Constant pain aggravated by activity due to flexion and medial rotation of knee

20

What are the differences between the different grades of avulsion fractures?

Avulsion Fracture: tendon or ligament pulls off a piece of the bone

  • Grade I: small disruption with minor swelling and pain 
    • Minimal loss of strength (if any)
  • Grade II: partial tears with definite pain 
    • Definite loss of strenth
  • Grade III: complete tear with severe pain and hematoma
    • Complete loss of motor function 

21

What muscles do the perforating arteries supply?

  • Posterior Thigh Muscles
    • ​​​​Semitendinosus Muscle
    • Semimembranosus Muscle
    • Biceps Femoris Muscle (both heads)
  • Adductor Magnus Muscle 

Peforating arteries pierce through Adductor muscles to go anterior to posterior 

22

What does the descending branch of the Lateral Circumflex Femoral Artery supply?

 

Genicular anastomosis

23

What vessel gives rise to the Fibular Artery?

The posterior tibial artery

24

What are the nerve roots of the Tibial Division of the Sciatic Nerve?

L4-S3

25

What are the nerve roots of the Common Fibular Division of the Sciatic Nerve?

L4-S2

26

What are the nerve roots of the hamstring muscles?

L5-S2

27

What are the four borders of the popliteal fossa?

Superomedially: Semitendinosus and Semimembranosus

Superolaterally: Biceps Femoris

Inferomedially: Medial head of the gastrocnemius

Inferolaterally: Lateral head of the gastrocnemius

28

What are the contents of the popliteal fossa?

Superficial to Deep:

  • Nerves
  • Popliteal Vein and Lymph Nodes
  • Popliteal Artery and Branches

29

What are the terminal branches of the Popliteal Artery?

Anterior Tibial Artery

Posterior Tibial Artery

30

Where does the Genicular Artery arise from?

What does it supply?

 

From Femoral Artery in adductor canal

Genicular anastomosis