31. Posterior Thigh and Popliteal Fossa

Question 1

Which muscles make up the posterior thigh?

Answer 1

Hamstrings - semitendonosus, semimembranosus, biceps femoris

Question 2

Action of posterior thigh muscles?

Answer 2

Extend hip
Flex knee

Also contribute to rotation of the knee

Question 3

Origin of semitendinosus?

Answer 3

Ischial tuberosity

Question 4

Insertion of semitendinosus?

Answer 4

Medial surface of superior tibia

Question 5

Innervation of semitendinosus?

Answer 5

Tibial division of sciatic L5, S1, S2

Question 6

Origin of semimembranosus?

Answer 6

Ischial tuberosity

Question 7

Insertion of semimembranosus?

Answer 7

Posterior surface of medial condyle of tibia

Question 8

Innervation of semimembranosus?

Answer 8

Tibial division of sciatic L5, S1, S2

Question 9

Origin of biceps femoris?

Answer 9

Long head - ischial tuberosity

Short head - linea aspera and lateral supracondylar line of femur

Question 10

Insertion of biceps femoris?

Answer 10

Head of fibula

Question 11

Innervation of biceps femoris?

Answer 11

Long - tibial division of sciatic L5, S1, S2

Short - common peroneal division of sciatic L5, S1, S2

Question 12

Which posterior thigh muscles laterally rotate the knee when the knee IS FLEXED?

Answer 12

Biceps femoris

Question 13

Which posterior thigh muscles medially rotate the knee when the knee IS FLEXED?

Answer 13

Semimembranosus
Semitendinosus
Gracilis
Sartorius

Question 14

Which posterior thigh muscle does the sciatic nerve pass deep to?

Answer 14

Long head of biceps femoris

Question 15

What nerves and vessels pierce the deep fascial roof of the popliteal fossa?

Answer 15

Sural nerve

Short saphenous vein

Question 16

Superior boundary of popliteal fossa?

Answer 16

Diverging tendons of hamstrings
Lateral - biceps femoris
Medial - semimem/tend

Question 17

Inferior boundary of popliteal fossa?

Answer 17

Medial and lateral heads of gastrocnemius

Question 18

Contents of popliteal fossa?

Answer 18

Popliteal artery (medial and deep)
Popliteal vein
Tibial nerve
Common fib nerve (lateral and superficial)

Question 19

What makes up the floor of the popliteal fossa?

Answer 19

Popliteal surface of femur
Capsule of knee joint
Popliteus muscle

Question 20

What makes up the floor of the popliteal fossa?

Answer 20

Oblique popliteal ligament

Question 21

What tendon does the oblique popliteal ligament come from?

Answer 21

Expansion of semimembranosus

Question 22

What vessels pierce the joint capsule of knee joint?

Answer 22

Middle genicular vessels

Question 23

What do the middle genicular vessels supply?

Answer 23

Cruciate ligaments

Question 24

Where does the popliteal artery run to and from?

Answer 24

Adductor hiatus

Inferior border of popliteus

Question 25

How many genicular artery branches of popliteal are there?

Answer 25

5

Question 26

What are the terminal branches of the popliteal artery?

Answer 26

Anterior and posterior tibial