Anterior Thigh Muscles

Question 1

Pectineus - Origin

Answer 1

Superior ramus of pubis

Question 2

Pectineus - Insertion

Answer 2

Pectineal line of femur, just inferior to lesser trochanter

Question 3

Pectineus - Innervation

Answer 3

Fermoral nerve (L2, L3)

Question 4

Pectineus - Action(s)

Answer 4

Flexes, adducts, and medially rotates thigh

Question 5

Sartorius - Origin

Answer 5

Anterior superior iliac spine (ASIS)

Question 6

Sartorius - Insertion

Answer 6

Medial and Proximal tibia

Question 7

Sartorius - Innervation

Answer 7

Femoral Nerve (L2, L3)

Question 8

Sartorius - Action(s)

Answer 8

Flexes, abducts, and laterally rotates thigh

Flexes knee joint

Question 9

What muscles are included when referring to the Iliopsoas?

Answer 9

Psoas Major

Iliacus

Question 10

Psoas Major - Origin

Answer 10

Bodies and transverse processes of T12-L5

Question 11

Psoas Major - Insertion

Answer 11

Lesser trochanter of femur

Question 12

Psoas Major - Innervation

Answer 12

Anterior rami of lumbar nerves (L1-L3)

Question 13

Psoas Major - Action(s)

Answer 13

Flexes thigh at hip joint and stabilizes trunk

Question 14

Iliacus - Origin

Answer 14

Iliac crest
Iliac fossa
Ala of sacrum
Sacroiliac ligament

Question 15

Iliacus - Insertion

Answer 15

Lesser trochanter and femur

Question 16

Iliacus - Innervation

Answer 16

Femoral Nerve

Question 17

Iliacus - Action(s)

Answer 17

Acts conjointly with Psoas Major in flexing hip joint and in stabilizing this joint

Question 18

What muscles are known as the Quadriceps femoris?

Answer 18

Rectus Femoris
Vastus Lateralis
Vastus Medialis
Vastus Intermedius

Question 19

Rectus Femoris - Origin

Answer 19

Anterior inferior iliac spine (ASIS)

Ilium superior to acetabulum

Question 20

Rectus Femoris - Insertion

Answer 20

Via common tendinous (quad tendon) and independent attachments to base of patella
Indirectly via patellar ligament to tibial tuberosity
Vastus medialis and lateralis also attach to tibia and patella via aponeuroses (medial and lateral patellar retinacula)

Question 21

Rectus Femoris - Innervation

Answer 21

Femoral Nerve (L2, L3, L4)

Question 22

Rectus Femoris - Action(s)

Answer 22

Extend knee joint

Rectus Femoris also stabilizes (helps fix in position) hip joint and helps iliopsoas flex hip joint

Question 23

Vastus Lateralis - Origin

Answer 23

Greater trochanter and lateral lip of linea aspera

Question 24

Vastus Lateralis - Insertion

Answer 24

Via common tendinous (quad tendon) and independent attachments to base of patella
Indirectly via patellar ligament to tibial tuberosity
Vastus medialis and lateralis also attach to tibia and patella via aponeuroses (medial and lateral patellar retinacula)

Question 25

Vastus Lateralis - Innervation

Answer 25

Femoral Nerve (L2, L3, L4)

Question 26

Vastus Lateralis - Action(s)

Answer 26

Extend knee joint

Question 27

Vastus Medialis - Origin

Answer 27

Intertrochanteric line and medial lip of linea aspera

Question 28

Vastus Medialis - Insertion

Answer 28

Via common tendinous (quad tendon) and independent attachments to base of patella
Indirectly via patellar ligament to tibial tuberosity
Vastus medialis and lateralis also attach to tibia and patella via aponeuroses (medial and lateral patellar retinacula)

Question 29

Vastus Medialis - Innervation

Answer 29

Femoral Nerve (L2, L3, L4)

Question 30

Vastus Medialis - Action(s)

Answer 30

Extend knee joint

Question 31

Vastus Intermedius - Origin

Answer 31

Anterior and lateral surfaces of shaft of femur

Question 32

Vastus Intermedius - Insertion

Answer 32

Via common tendinous (quad tendon) and independent attachments to base of patella
Indirectly via patellar ligament to tibial tuberosity
Vastus medialis and lateralis also attach to tibia and patella via aponeuroses (medial and lateral patellar retinacula)

Question 33

Vastus Intermedius - Innervation

Answer 33

Femoral Nerve (L2, L3, L4)

Question 34

Vastus Intermedius - Action(s)

Answer 34

Extend knee joint