Muscles of Anterior Thigh

Question 1

Which two muscles does the iliaspsoas consist of?

Answer 1

Psoas major and iliacus

Question 2

What actions is the iliapsoas involved in?

Answer 2

Flexion and lateral rotation of the leg at the hip joint

Question 3

What is the origin and insertion of the iliacus?

Answer 3

Originates from iliac fossa of pelvis and inserts into lesser trochanter of the femur

Question 4

What is the origin and insertion of the psoas major?

Answer 4

Originates from T12-L5, inserts into the lesser trochanter of the femur

Question 5

What is the innervation of psoas major?

Answer 5

Anterior rami of L1-L3

Question 6

What is the innervation of the iliacus?

Answer 6

Femoral nerve

Question 7

What 4 muscles does the quadratus femoris consist of?

Answer 7

Vastus lateralis, vastus intermedius, vastus medialis, rectus femoris

Question 8

Where do all the muscles of the quadratus femoris insert?

Answer 8

They all join above the knee as the quadratus femoris tendon and attach to the patella via the quadriceps femoris tendon (quadratus femoris tendon continues distal to patella as the patella ligament)

Question 9

How is the patella attached to the tibia?

Answer 9

By the patella ligament/tendon (they’re the same thing)

Question 10

What is the function of the vastus muscles?

Answer 10

Flexion at hip, extension at knee

Question 11

Where does the vastus lateralis originate and insert?

Answer 11

Originates from greater trochanter of the femur and lateral lip of the linea aspera, inserts into patella via quadriceps femoris tendon

Question 12

Where does the vastus intermedius originate and insert?

Answer 12

Originates from anterior and lateral aspects of femoral shaft, inserts into patella via quadriceps femoris tendon

Question 13

Where does the vastus medialis originate and insert?

Answer 13

Originates from intertrochanteric line and medial lip of the linea aspera, inserts into patella via quadriceps femoris tendon

Question 14

Where is the greater trochanter?

Answer 14

Lateral to the head of the femur

Question 15

What is the action of the rectus femoris muscle?

Answer 15

Flexion at hip, extension at knee

Question 16

Where does the rectus femoris originate and insert?

Answer 16

Originates from anterior inferior iliac spine and acetabulum, inserts into patella via quadriceps femoris tendon

Question 17

Which joints does the rectus femoris cross?

Answer 17

Crosses hip and knee joints

Question 18

What are the actions of the Sartorius muscle?

Answer 18

. Flexion, abduction, lateral rotation at the hip joint

. Flexion at knee joint

Question 19

What is the origin and insertion of the Sartorius muscle?

Answer 19

Originates from the anterior superior iliac spine, attaches to the superior medial surface of the tibia

Question 20

What is the innervation of the Sartorius?

Answer 20

Femoral nerve

Question 21

What is the function of the pectineus muscle?

Answer 21

Flexion, adduction, medial rotation at hip

Question 22

What is the origin and insertion of the pectineus muscle?

Answer 22

Originates from superior ramus of pubis, inserts at pectineal line on posterior surface of femur, just inferior to the lesser trochanter

Question 23

What is the innervation of the pectineus muscle?

Answer 23

Femoral nerve and obturator nerve

Question 24

What is the ilium?

Answer 24

The largest part of the hip bone (the two symmetrical wing-like parts)

Question 25

What does vastus medialis do?

Answer 25

Flexion at hip, extension at knee

Question 26

What does vastus lateralis do?

Answer 26

Flexion at hip, extension at knee

Question 27

What does vastus intermedius do?

Answer 27

Flexion at hip, extension at knee

Question 28

What is the difference between the patellar tendon and patellar ligament?

Answer 28

They are the same thing! It’s a continuation of the quadriceps femoris tendon distal to the patella

Question 29

Which lumbar vertebrae does psoas major originate from?

Answer 29

T12-L5 (innervated by anterior rami of L1-L3)

Question 30

Which muscles insert into the lesser trochanter?

Answer 30

Psoas major and iliacus