Thigh (Anterior)

Question 1

The four headed muscle of the anterior compartment of thigh?

Answer 1

Quadriceps femoris

Question 2

Difference between quadratus femoris and quadriceps femoris?

Answer 2

Quadratus femoris - in the hip
Quadriceps femoris - in the thigh

Question 3

Name muscles of anterior compartment of thigh?

Answer 3

1.Sartorius
2.Iliacus
3.Psoas
4.Pectineus
5.Quadriceps femoris
•Rectus femoris
•Vastus lateralis
•Vastus medialis
•Vastus intermedius

Question 4

How many compartments of thigh? Name

Answer 4

Anterior - extensor
Medial - adductor
Posterior - flexor

Question 5

Anterior compartment of thigh is innervated by?

Answer 5

Femoral nerve

Question 6

What are the iliopsoas muscles?

Answer 6

Iliacus and psoas are collectively known as iliopsoas muscles

Question 7

Origin and insertion of iliacus muscle?

Answer 7

origin
Iliac fossa of hip bone

Insertion
With psoas on lesser trochanter of femur

Question 8

Psoas major origin and insertion?

Answer 8

origin
12th thoracic vertebrae (T12)
5 lumber vertebrae (L1 - L5)

Insertion
With iliacus on lesser trochanter of femur

Question 9

The most superficial muscle on anterior compartment of thigh is?

Answer 9

Sartorius

Question 10

Origin and insertion of rectus femoris?

Answer 10

origin
Straight head - anterior inferior iliac spine
Reflected head - ileum above the acetabulum

Insertion
Quadriceps tendon into patella

Question 11

Rectus femoris along with vastus muscles inserts into?

Answer 11

Patella via quadriceps tendon

Question 12

Patella is attached to tibia by?

Answer 12

Patellar ligament

Question 13

Why only rectus femoris can flex the thigh at hip joint and other vastus muscles of quadriceps femoris can’t flex it?

Answer 13

Because rectus femoris originates on the pelvis (hip bone). It also extends the leg at knee joint.

But vastus muscles originate on the femur

Question 14

Orgin and insertion of vastus muscles?

Answer 14

Upper end and shaft of femur

Vastus medialis
Vastus lateralis

Shaft of femur

Vastus intermedius

Question 15

Common Action of all vastus muscles?

Answer 15

Extend the leg at knee joint

Question 16

Origin and insertion of sartorius muscle?

Answer 16

origin
Anterior superior iliac spine

Insertion
Upper medial surface of shaft of the tibia

Question 17

Which is the Longest muscle of the body?

Answer 17

Sartorius

Question 18

Innervation of psoas muscle?

Answer 18

Lumbar plexus

Question 19

All muscles of anterior compartment of thigh are innervated by femoral nerve except?

Answer 19

Psoas - lumbar plexus

Question 20

Origin and insertion of pectineus?

Answer 20

origin
Superior ramus of the pubis

Insertion
Pectineal line on Upper end of shaft of femur

Question 21

The muscles of anterior compartment of thigh that originate and insert into femur?

Answer 21

originate

Vastus lateralis (upper end and shaft of femur)
Vastus medialis(upper end and shaft of femur)
Vastus intermedius (shaft of femur)

Insert

Pectineus - (upper end and shaft of femur)
Psoas - (lesser trochanter of femur)
Iliacus - (lesser trochanter of femur)

Question 22

Action of pectineus?

Answer 22

Flexes and adducts the thigh at hipjoint

Question 23

Which muscles of the anterior compartment are flexors and which are extensors?

Answer 23

flex
Sartorius
Iliacus
Psoas
Pectineus
(Rectus femoris)

Extend
Quadriceps femoris
(Rectus femoris)
Vastus lateralis
Vastus Medialis
Vastus Intermedius

Question 24

Action of sartorius?

Answer 24

Flexes abducts and laterally rotates the thigh at hip joint

Flexes and medially rotates the leg at the knee

Question 25

Sartorius _________ rotates the thigh and _________ rotates the leg?

Answer 25

Laterally rotates ---- thigh Medially rotates ----- leg

Question 26

Difference in action of pectineus and sartorius?

Answer 26

Sartorius - *abducts* Pectineus - *adducts*

Question 27

Which artery supplies the anterior compartment of the thigh?

Answer 27

Femoral artery

Question 28

Iliopsoas muscle pass under _____ ligament to enter anterior compartment of thigh?

Answer 28

Inguinal ligament

Question 29

The only muscle of quadriceps group that crosses both the hip and knee joint?

Answer 29

Rectus femoris

Question 30

Difference in origin of sartorius and rectus femoris?

Answer 30

**sartorius** Anterior *superior* iliac spine **Rectus femoris** Anterior *inferior* iliac spine

Question 31

Shape of pectineus?

Answer 31

Flat quadrangular

Question 32

Which muscle contribute to floor of femoral triangle?

Answer 32

Pectineus

Question 33

Pectineus inserts into which part of femur?

Answer 33

Pectineal line on the *posterior* aspect of femur immediately inferior to lesser trochanter

Question 34

Which vastus muscle extends farther distally ?

Answer 34

Vastus medialis extends farther distally than vastus lateralis

Question 35

Which muscle is the first to atrophy in knee joint disease and the last one to recover?

Answer 35

**Vastus medialis** is the first part of quadriceps muscle to atrophy in knee joint disease and the last to recover

Question 36

What causes rectus femoris rupture? What happens

Answer 36

Sudden violent **extension** movement of knee joint Muscle belly retracts *proximally* Gap on anterior surface of thigh

Question 37

What causes ligamentum patella rupture?

Answer 37

Sudden *flexing force* When quadriceps femoris is actively contracting

Question 38

Difference in rectus femoris rupture and ligamentum patallae rupture?

Answer 38

**rectus femoris** Violent **extension** of knee joint **Ligamentum patallae rupture** Sudden **flexing** force to knee joint