8: Anteromedial Thigh

Question 1

How do saphenous N and saphenous branch of descending genicular A leave the adductor canal?

Answer 1

Through medial canal

Question 2

What do superficial inguinal LNs drain?

Answer 2

External iliac LNs

Question 3

What do deep inguinal LNs drain into?

Answer 3

External iliac LNs

Question 4

Location of superficial vs deep inguinal LNs

Answer 4

Superficial: in superficial fascia deep to inguinal ligament
Deep: medial to femoral V in femoral canal

Question 5

Femoral Hernia

Answer 5

Small loop of SI can protrude through femoral ring into femoral canal

Question 6

Population where femoral hernias are more common

Answer 6

Women

Question 7

Common innervation of anterior thigh with exception

Answer 7

Femoral N (except psoas major and minor)

Question 8

Nine separate muscles of the anterior thigh

Answer 8

1. Iliacus
2. Psoas major
3. Psoas minor
4. Pectineus
5. Sartorius
6. Rectus femoris
7. Vastus lateralis
8. Vastus medialis
9. Vastus intermedius

Question 9

Chief flexor of the thigh

Answer 9

Iliopsoas

Question 10

Innervation of the three parts of the iliopsoas

Answer 10

1. Iliacus: femoral N
2. Psoas major: L1-3 anterior rami
3. Psoas minor: L1-2 anterior rami

Question 11

Iliopsoas O and I

Answer 11

O: lateral portion of bodies T12-L5, sacrum
I: lesser trochanter

Question 12

Pectineus A

Answer 12

Adduct and flex thigh (acts like a medial muscle of thigh but technically anterior)

Question 13

Pectineus O and I

Answer 13

O: pectineal line of pubis
I: pectineal line of femur

Question 14

Longest muscle in body

Answer 14

Sartorius

Question 15

Sartorius O and I

Answer 15

O: ASIS
I: pes anserinus

Question 16

Three tendons that make up the pes anserinus

Answer 16

Sartorius, gracilis, semitendinosis

Question 17

Sartorius A

Answer 17

Flex, abduct, laterally rotate thigh + flex leg

Question 18

Four quadriceps muscles

Answer 18

Rectus femoris, vastus lateralis, vastus medialis, vastus intermedius

Question 19

Which muscle of the quads passes two joints?

Answer 19

Rectus femoris

Question 20

O for rectus femoris vs vastus muscles

Answer 20

Rectus femoris O: AIIS

Vastus O: shaft of femur

Question 21

Common insertion of quadriceps femoris

Answer 21

Tibial tuberosity

Question 22

A of rectus femoris vs vastus muscles

Answer 22

Rectus femoris: extend leg + flex thigh

Vastus: extend leg

Question 23

Chief extensor of the leg

Answer 23

Quadriceps femoris

Question 24

What does the quadriceps tendon eventually form?

Answer 24

Patellar ligament

Question 25

Osgood-Schlatter

Answer 25

Child’s quads pull on patellar ligament, tendon pulls away from tibia -> pain and swelling; some children may form new bone growth, causing a bony lump in that spot

Question 26

Medial thigh common innervation and one exception

Answer 26

Obturator N (besides hamstring part of adductor magnus)

Question 27

What is the only adductor / medial thigh muscle to cross the knee joint?

Answer 27

Gracilis

Question 28

Gracilis O and I

Answer 28

O: pubis body, inferior ramus I: superior tibia

Question 29

Gracilis A

Answer 29

Adduct thigh, flex and medially rotate leg

Question 30

Adductor longus O and I

Answer 30

O: body of pubis inferior to pubic crest I: middle 1/3 of linea aspera

Question 31

Adductor brevis and longus action

Answer 31

Adduct and flex thigh

Question 32

Adductor brevis relation to pectineus and adductor longus

Answer 32

Deep to both

Question 33

Adductor brevis O and I

Answer 33

O: pubis I: proximal linea aspera

Question 34

Largest adductor muscle

Answer 34

Adductor magnus

Question 35

Adductor portion of adductor magnus: O and I

Answer 35

O: ischiopubic ramus I: gluteal tuberosity, linea aspera, medial supracondylar line

Question 36

Hamstring portion of adductor magnus O and I

Answer 36

O: ischial tuberosity I: adductor tubercle

Question 37

innervation for adductor vs hamstring portion of adductor magnus

Answer 37

Adductor: obturator N Hamstring: tibial N from Sciatic N

Question 38

Adductor vs hamstring portion of adductor magnus: action

Answer 38

Adductor: adducts and flexes thigh Hamstring: adducts and extends thigh

Question 39

Obturator externus relation to pectineus

Answer 39

Deep to pectineus

Question 40

Obturator Externus O and I

Answer 40

O: external margins of obturator foramen I: trochanteric fossa

Question 41

Obturator externsus A

Answer 41

Laterally rotates thigh

Question 42

What is strained/stretched in a “groin pull”?

Answer 42

Proximal attachments of thigh adductor/flexor muscles

Question 43

Hilton’s Law

Answer 43

Nerves that supply motor branches to muscles crossing a joint also provide branches to skin over the muscles and to periarticular tissues

Question 44

Spinal cord level for a joint

Answer 44

Joints always have nerves from more than one level of the spinal cord