Anterior & Medial Thigh

Question 1

Where does psoas major insert? Originate?

Answer 1

Insertion: Lesser Trochanter of femur

Origin: T12 to L5 Vertebrae

Question 2

Where does the Iliacus originate?

Answer 2

Iliac fossa

Question 3

Where does the iliacus insert?

Answer 3

Lesser trochanter of femur

Question 4

What innervates the Psoas major?

Answer 4

L1-L3 ventral Rami

Question 5

What innervates the iliacus?

Answer 5

Femoral N. (L2-L4)

Question 6

What is the action of the iliopsoas muscle?

Answer 6

hip flexion

Question 7

What is the strongest hip flexor?

Answer 7

ilipsoas muscle

Question 8

What are the four parts of the quadraceps femoris muscle?

Answer 8

rectus femoris, vastus lateralis, vastus medialis, vastus intermedius

Question 9

Where does the rectus femoris muscle orginate?

Answer 9

Straight head - Anterior Inferior Iliac Spine (AIIS)

Reflected Head - Superior aspect of the acetabulum

Question 10

Where does the vastus lateralis originate?

Answer 10

femur

Question 11

Where does the vastus intermedius originate?

Answer 11

femur

Question 12

Where does the vastus medialis originate?

Answer 12

femur

Question 13

Where do all of the quadraceps femoris muscles insert?

Answer 13

Patella and Tibial tuberosity via the quadraceps tendon and patellar ligament

Question 14

What innervates the entire quadraceps femoris muscle?

Answer 14

Femoral N. (L2-L4)

Question 15

What are the actions of the quadraceps femoris muscles?

Answer 15

knee extension (primarily),

Rectus femoris can weakly flex the hip

Question 16

Where does the sartorius muscle originate?

Answer 16

anterior superior iliac spine of ilium (ASIS)

Question 17

Where does the sartorius insert?

Answer 17

the anterior slip of the pes anserinus on the medial aspect of the tibia

Question 18

What innervates the sartorius muscle?

Answer 18

Femoral N. (L2-L4)

Question 19

What are the actions of the sartorius muscle?

Answer 19

Sitting indian style:

Flexion, abduction, lateral rotation of femur

knee (tibia) flexion

Question 20

Where does the gracilis muscle originate?

Answer 20

pubis

Question 21

Where does the gracilis insert?

Answer 21

Middle slip of the pes anserinus on the medial aspect of the tibia

Question 22

What innervates the gracilis?

Answer 22

obturator N. (L2-L4)

Question 23

What are the actions of the gracilis muscle?

Answer 23

adduction of femur, knee flexion

Question 24

Where does the pectineus muscle originate?

Answer 24

pubis

Question 25

Where does the adductor longus muscle originate?

Answer 25

pubis

Question 26

Where does the pectineus insert?

Answer 26

pectineal line of the femur

Question 27

Where does the adductor longus insert?

Answer 27

linea aspera of femur

Question 28

what innervates the pectineus?

Answer 28

Femoral N (L2-L4)

Question 29

What innervates the adductor longus muscle?

Answer 29

Obturator N (L2-L4)

Question 30

What are the actions of the pectineus muscle?

Answer 30

adduction, medial rotation, and weak flexion of femur

Question 31

What are the actions of the adductor longus muscle?

Answer 31

adduction, medial rotation, and weak flexion of the femur

Question 32

Where does adductor brevis originate?

Answer 32

pubis

Question 33

Where does adductor brevis insert?

Answer 33

linea aspera of femur

Question 34

What innervates adductor brevis?

Answer 34

obturator N (L2-L4)

Question 35

What are the actions of adductor brevis?

Answer 35

Adduction, medial rotation, and weak flexion of thigh

Question 36

Where do both parts of adductor magnus originate?

Answer 36

pubis/ischium

Question 37

Where does the adductor part of adductor magnus insert?

Answer 37

linea aspera of femur

Question 38

Where does the hamstring part of adductor magnus insert?

Answer 38

Adductor tubercle of the femur

Question 39

What innervates adductor magnus?

Answer 39

Obturator N (L2-L4) Tibial N (L4-S3)

Question 40

What innervates the adductor part of adductor magnus?

Answer 40

Obturator N (L2-L4)

Question 41

What innervates the hamstring part of adductor magnus?

Answer 41

Tibial N (L4-S3)

Question 42

What are the actions of adductor magnus?

Answer 42

Adduction of femur Medial rotation of thigh Hip flexion (adductor part) Hip extension (hamstring part)

Question 43

Where does obturator externus originate?

Answer 43

pubis/Ischium (obturator foramen) and Obturator membrane

Question 44

Where does obturator externus insert?

Answer 44

intertrochanteric fossa of femur

Question 45

What innervates the obturator externus muscle?

Answer 45

obturator n. (L2-L4)

Question 46

What are the actions of obturator externus?

Answer 46

lateral rotation of thigh