anatomy exam 4, posterior abdominal wall, pelvis, and lower limb

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1

4 muscles of the posterior abdominal wall

psoas major, psoas minor, quadratus lumborum, and iliacus

2

quadratus lumborum attachments

12th rib, lumbar transverse processes (L1-L4), iliolumbar ligament, and internal lip of iliac crest

3

quadratus lumborum innervation

ventral rami T12-L4

4

quadratus lumborum actions

extends and lateral flexes vertebral column

fixes 12th rib during inspiration

(ex. hiking up your hip uses this muscle)

5

psoas major attachments

T12-L5 vertebrae and disks

L1-L5 transverse processes

lesser trochanter of femur

6

psoas major innervation

ventral rami L1-L3

7

psoas major actions

flexes trunk

flexes thigh at hip joint (flexion of the femur)

8

psoas minor attachments

T12-L1 vertebrae

pectineal line of the pubis

9

psoas minor innervation

ventral rami L1-L2

10

actions of psoas minor

flexes trunk (it's a weak flexor)

11

iliacus attachments

iliac crest and iliac fossa

ala of sacrum

anterior sacroiliac ligament

tendon of psoas major, lesser trochanter of femur

12

innervation of iliacus muscle

femoral nerve (L2)

13

action of iliacus muscle

flexes thigh at hip joint aka flexion of the femur

14

anterior thigh muscles

pectineus

iliopsoas

Sartorius

quadriceps femoris (rectus femoris, vastus lateralis, vastus medialis, vastas intermedius)

15

muscles of medial thigh

adductor longus

adductor brevis

adductor magnus

gracilis

obturator externus (deep muscle)

16

superficial layer of muscles of gluteal region

gluteus maximus, medius, and minimus, and tensor fascia lata

17

gluteus maximus attachments

-ilium, dorsal surface of sacrum and coccyx, sacrotuberous ligament (proximal)

-iliotibial tract and gluteal tuberosity (distal)

18

gluteus maximus innervation

Inferior gluteal nerve (L5, S1, S2)

19

actions of gluteus maximus

Big extensor of the thigh

Lateral rotation of the thigh

20

attachments of gluteus medius

-ilium (proximal)

-lateral surface of greater trochanter (distal)

21

innervation of gluteus medius

Superior gluteal nerve (L5 and S1)

22

actions of gluteal medius

-abduct and medially rotate thigh

-stabilizes pelvis in mid-stance phase of gait

23

attachments of gluteus minimus

-ilium (proximal)

-anterior surface of greater trochanter

24

innervation of gluteus minimus

superior gluteal nerve (L5, S1)

25

actions of gluteus minimus

-abduct thigh

-medially rotate thigh

-stabilize pelvis during midstance phase of gait

26

deep layer of muscles of the gluteal region

piriformis, obturator internus, superior and inferior gemelli, and quadratus femoris

27

tensor fascia lata attachments

-ASIS; anterior portion of the iliac crest

-iliotibial tract

28

innervation of tensor fascia lata

superior gluteal nerve (L5, S1)

29

actions of tensor fascia lata

flex, abduct, and internally rotate the hip

30

attachments of piriformis

-anterior surface of sacrum and sacrotuberous ligament (proximal)

-superior border of greater trochanter (distal)

31

innervation of piriformis

branches of anterior rami of S1 and S2

32

actions of piriformis

laterally rotate extended thigh

abduct flexed thigh

33

quadratus femoris attachments

lateral border of ischial tuberosity (proximal)

quadrate tubercle of femur (distal)

34

innervation of quadratus femoris

Nerve to quadratus femoris (L5, S1)

35

actions of quadratus femoris

laterally rotate thigh

36

obturator internus attachments

-pelvic surface of obturator membrane (proximal)

-inserts into trochanteric fossa (distal)

37

innervation of obturator internus

nerve to obturator internus (L5, S1)

38

actions of obturator internus

lateral rotation of the thigh

39

attachments of superior gemellus

-ischial spine (proximal)

-trochanteric fossa

40

innervation of superior gemellus

nerve to obturator internus (L5, S1)

41

actions of superior gemellus

lateral rotation of the thigh

42

attachments of the inferior gemellus

ischial tuberosity (proximal)

trochanteric fossa (distal)

43

innervation of the inferior gemellus

nerve to quadratus femoris (L5, S1)

44

action of inferior gemellus

lateral rotation of thigh

45

lumbar plexus- L1 branch

iliohypogastric nerve

ilioinguinal nerve

genitofemoral nerve

46

lumbar plexus- L2 branch

obturator nerve

femoral nerve

genitofemoral nerve

lateral cutaneous nerve of the thigh

47

lumbar plexus- L3 branch

femoral nerve

obturator nerve

lateral cutaneous nerve of the thigh

48

lumbar plexus- L4 branch

femoral nerve

obturator nerve

lumbosacral trunk

49

lumbar plexus- L5 branch

lumbosacral trunk

50

arteries of posterior abdominal wall- unpaired visceral branch

celiac

superior mesenteric artery

inferior mesenteric artery

51

arteries of posterior abdominal wall- paired visceral

suprarenal arteries

renal arteries

gonadal arteries

52

arteries of posterior abdominal wall- paired parietal

subcostal arteries

inferior phrenic arteries

lumbar arteries

53

arteries of posterior abdominal wall- unpaired parietal

median sacral artery

54

Pelvis major

false pelvis; between iliac crest and pelvic line- viscera found here

55

pelvic inlet

terminal lines

56

pelvis minor

true pelvis; not supported by mesentery

57

pelvic outlet

leads to perineum

58

bladder control- internal urethral sphincter

parasympathetic stimulation causes relaxation

sympathetic stimulation causes contraction

59

bladder control- external urethral sphincter

a true sphincter in males

a urogenital sphincter in females

innervated by deep perineal nerve

voluntary control

60

Foley Catheter

helps urine get out of the bladder. It's a tube that is inserted into the urethra to the body of the bladder. There's a syringe that adds air in inflated balloon to keep it in place. Becomes a risk or route for infection that can eventually get up to the kidney.