Dissection 11

Question 1

Posterior cutaneous nerve of the thigh

Answer 1

S1-S3

medial to the sciatic nerve

Question 2

Where does the sciatic nerve emerge from?

Answer 2

Inferior to piriformis

Question 3

What does the sciatic nerve divide into?

Answer 3

The tibial nerve and the common fibular nerve

Question 4

Sciatic nerve

Answer 4

L4-S3

Question 5

What forms the superior border of the popliteal fossa?

Answer 5

The hamstring muscles

Question 6

Where do the perforating arteries come from?

Answer 6

Come from the profunda femoris artery (enter the hamstrings on their deep surface)

Question 7

What do the hamstring muscles do?

Answer 7

Extend the hip joint

Flex the knee joint

Question 8

Where does the biceps femoris attach to?

Answer 8

The lateral aspect of the head of the fibula (linea aspera of the femur)

Question 9

Why can the short head of the biceps femoris not be considered a “true” hamstring muscle?

Answer 9

It attaches proximally to the linea aspera of the femur, not the ischial tuberosity

It does not cross the hip joint and therefore does not contribute to the movement of the hip joint

It is supplied by the common fibular branch of the sciatic nerve rather than the tibial branch

Question 10

Where do the semitendinous and semimebranous attach to?

Answer 10

The proximal tibia

Question 11

What increases the depth of the acetabulum?

Answer 11

The acetabular labrum

Question 12

What does the ligament of the head of femur attach?

Answer 12

Attaches the femur to the depth of the acetabulum

ruptured during dislocation

Question 13

What is special about the ligament of the head of the femur in children?

Answer 13

The artery to the head of the femur runs within it (only in children, obliterated in adulthood)