anatomy exam 4, thigh muscles

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1

anterior compartment of the thigh muscles

pectineus, iliopsoas, Sartorius, and quadriceps femoris

2

attachments of pectineus

superior ramus of the pubis

pectineal line of the femur

3

pectineus innervation

femoral nerve (L2, L3)

4

pectineus actions

adduct/flexion of the thigh

medial rotation of the thigh

5

iliopsoas made of which 3 muscles?

psoas major, psoas minor, and iliacus

6

Sartorius attachments

ASIS

superior part of medial condyle of the tibia- pes anserine insertion

7

Sartorius innervation

femoral nerve (L2, L3)

8

Sartorius actions

"tailor sitting" muscle

flex, abduct, externally rotate thigh, flex knee

9

4 muscles of quadriceps femoris muscle

rectus femoris, vastus lateralis, vastus medius, and vastus medialis

10

innervation of quadriceps femoris

femoral nerve (L2,L3, L4)

11

actions of quadriceps femoris muscles

extend leg at the knee joint

flex thigh at hip joint (rectus femoris only)

12

distal attachment for all 4 of the quadriceps muscles

patellar tendon to tibial tuberosity

13

proximal attachment of rectus femoris

anterior inferior iliac spine (AIIS)

14

proximal attachment of vastus lateralis

greater trochanter and lateral lip of linea aspera

15

proximal attachment for vastus medialis

intertrochanteric line and medial lip of linea aspera

16

proximal attachment of vastus intermedius

anterior and lateral surfaces of body femur

17

medial thigh muscles

adductor longus, adductor brevis, adductor magnus, gracilis, and obturator externus

18

attachments for adductor longus

body of pubis

middle third of linea aspera

19

innervation of adductor longus

obturator nerve (L3)

20

actions of adductor longus

adducts thigh

21

attachment for adductor brevis (deep to longus)

body and inferior ramus of pubis

pectineal line and proximal part of linea aspera

22

innervation of adductor brevis

obturator nerve (L3)

23

actions of adductor brevis

adduct and weakly flex thigh

24

adductor magnus attachments

inferior ramus of pubis and ischial ramus

ischial tuberosity

gluteal tuberosity, linea aspera, medial supracondylar line

adductor tubercle of femur

25

adductor magnus innervation

obturator nerve (L3)

Tibial part of sciatic nerve (L3, L4)

26

actions of adductor magnus

adduct and flex/extend the thigh

27

attachments of gracilis

body and inferior ramus of pubis

superior part of medial surface of tibia- pes anserine insertion

28

gracilis innervation

obturator nerve (L2)

29

actions of gracilis

adduct thigh

medially rotate and flex leg

30

obturator externus attachments

margins of obturator foramen and obturator membrane

trochanteric fossa of femur

31

innervation of obturator externus

obturator nerve

32

actions of obturator externus

laterally rotate thigh

33

nerve of the anterior thigh

femoral nerve (largest branch of the lumbar plexus)

saphenous nerve

34

nerve of the medial thigh

obturator nerve

anterior branch: adductor longus and adductor brevis

posterior branch: adductor magnus

35

arteries of the thigh

femoral artery

-deep artery of the thigh

-circumflex femoral (medial and lateral)

-obturator artery

36

location and boundaries of adductor canal

deep to Sartorius

Boundaries: anteriorly and laterally by vastus medialis; posteriorly by adductors longus and magnus; medially by sartorius

37

contents of adductor canal

femoral artery

femoral vein

nerve of vastus medialis