Anatomy-Back of the thigh and popliteal fossa-->Week 8

Question 1

Dermatomes of the back of the thigh

Answer 1

S2

Question 2

Dermatomes at the upper part of the back of the leg

Answer 2

S2

Question 3

The lower part of the back of the leg and heel

Answer 3

S1

Question 4

What consists of the hamstring muscles?

Answer 4

• Semitendinosus: Medial
• Semimembranosus muscles: Medial
• Biceps femoris muscle: Lateral

Question 5

What are the actions of hamstring muscles?

Answer 5

• Flexion of the knee

- Extension of the hip joint

Question 6

What is the function of the biceps femoris?

Answer 6

Laterally rotate the knee joint, flexion of the knee extension of the hip

Question 7

Which muscle has two head?

Answer 7

Biceps femoris

Question 8

What is the origin of the long head of the biceps femoris?

Answer 8

-Lower medial part of the upper area of the ischial tuberosity.

Question 9

What is the origin of the short head of the biceps femoris?

Answer 9

-Lateral lip of linea aspera and upper part of the lateral supracondylar line.

Question 10

What is the origin of semitendinosus?

Answer 10

With the long head of biceps from the lower medial part of the upper area of the ischial tuberosity.

Question 11

What is the origin of semimembranosus?

Answer 11

The upper lateral part of the upper area of the ischial tuberosity.

Question 12

What is the insertion of the biceps femoris?

Answer 12

Styloid process of the fibula.

Question 13

What is the insertion of semitendinosus?

Answer 13

The upper part of the medial surface of the tibia behind the sartorius and gracilis.

Question 14

What is the insertion of semimembranosus?

Answer 14

Back of the medial condyle of the tibia

Question 15

What is the nerve supply of the hamstring muscles?

Answer 15

Sciatic nerves are supplied all by the tibial part except the short head of biceps by the common peroneal part.

Question 16

What is the position of popliteal fossa?

Answer 16

-Fascial space behind the knee joint

Question 17

What is the shape of the popliteal fossa?

Answer 17

Diamond-shaped space

Question 18

What are the boundaries of popliteal fossa?

Answer 18

• Upper lateral boundary: Biceps femoris muscle.
• Upper medial boundary: semitendinosus and semimembranosus muscles
• Lower medial boundary: medial head of the gastrocnemius.
• Lower lateral boundary: Lateral head of gastrocnemius muscle and plantaris muscle.

Question 19

What is the roof of popliteal fossa?

Answer 19

• Skin
• Superficial fascia containing small saphenous vein and the posterior cutaneous nerve of the thigh.
• Deep fascia

Question 20

What is the floor of the popliteal fossa?

Answer 20

• Upper part: the popliteal surface of the femur
• Middle part: capsule of the knee joint.
• Lower part: Fascia covering popliteus

Question 21

What is the lower limit of the popliteal fossa?

Answer 21

Distal border of the popliteus muscle.

Question 22

What are the contents of the vessels in popliteal fossa?

Answer 22

• Popliteal artery
• Popliteal vein
• Terminal part of the small saphenous vein

Question 23

What are the contents of nerves in the popliteal fossa?

Answer 23

• Tibial nerve
• Common peroneal(fibular) nerve
• Sympathetic plexus around the popliteal artery.

Question 24

What does the popliteal fossa contain?

Answer 24

• Vessels
• Nerves
• Popliteal lymph nodes
• Fat