Manual 119-121: Nerves of Pelvis and Gluteal Region Flashcards Preview

Anatomy Lower Limb > Manual 119-121: Nerves of Pelvis and Gluteal Region > Flashcards

Flashcards in Manual 119-121: Nerves of Pelvis and Gluteal Region Deck (37):
1

lumbar plexus

anterior primary rami
T12-part L4

2

iliohypogastric n

T12/L1
- located at cranial end of lateral psoas major, crosses quadratus lumborus, passes iliac crest, enters internal surface of transversus abdominis and internal oblique

3

branches off iliohypogastric n

- lateral cutaneous branches [posterior gluteal area]
- anterior cutaneous branches [hypogastic region]
- muschel branches to transversus abdominus and internal oblique

4

ilioinguinal n

L1
- located lateral border psoas major, caudal to the iliohypogastric n, running parallel with the iliohypogastric n across quadratus lumborum to iliac crest and pierces transversus abdominis

5

where do ilioinguinal n and iliohypogastric n communicate?

between tansversus abdominis and internal oblique

6

what n goes with sperm cord through superficial inguinal ring

ilioinguinal
- supplies medial thigh, root of penis and anterior scrotum

7

genitofemoral n

L1,2
- passes through psoas major to ventral surface

8

genital branch of genitofemoral n

- joins spermatic cord/round ligament
- supplies lateral scrotum and adjacent thigh

9

femoral branch of genitofemoral n

- lateral to genital branch
- deep to inguinal ligament in LATERAL FEMORAL SHEATH
- supplies skin over anterior thigh

10

nerves off anterior division of L2-L4

obturator n L2-4
accessory obturator L3-4

11

obturator n

L2-4
-located medial to psoas major, enters pelvis under iliac vessels, exits through obturator canal

12

how often is accessory obturator n present

10%

13

accessory obturator n

L3-4
- medial to psoas, leaves pelvis by passing superior to pubic ramis
- deep to pectineus in thigh giving off a muscular branch
- hip articular joint brnach

14

nerves off the posterior division of L2-4

femoral L2-4
lateral femoral cutaneous L2-3

15

femoral n

L2-4
- through the psoas major, distal b/w psoas major and iliacus
- leaves pelvis deep to inguinal ligament running with lateral femoral a

16

lateral femoral cutaneous n L2-3

L2-3
- middle/lateral border psoas major, over iliacus, to ASIS
- inferior to inguinal ligament, over the sartorius

17

supply of anterior and posterior branches of lateral femoral cutaneous n

anterior: skin over lateral/anterior thigh
posterior: skin lateral thigh from greater trochanter distally to mid-thigh

18

if ilioinguinal n absent, what takes over its innervation

genitofemoral n

19

sacral plexus

part L4-part S4

20

location sacral plexus

medial to pififormis, converging at the greater sciatic foramen

21

L4 =

nervus furcalis
( part of both plexuses)

22

what branches of sacral plexus divide into anterior and posterior divisions?

all branches except S4 branch into anterior and posterior divisions

23

nn off anterior division of sacral plexus

n to quadratus femoris/inferior gemellus L4-S1
n to obturator internus/superior gemellus L5-S2

24

nn off posterior division of sacral plexus

n to piriformis
superior gluteal n
inferior gluteal n

25

n to quadratus femoris

L4-S1
- supplies quadratus femoris and inferior gemellus
- goes through sciatic foramen ventral to the sciatic n
- sends articular branch to hip joint

26

n to obturator internus

L5-S2
- supplies obturator internus and superior gemellus
- goes through greater sciatic foramen and reenters through less sciatic foramen to get to obturator internus

27

n to piriformis

S2 or S1/2

28

superior gluteal n

L4-S1
- goes through greater sciatic foramen superior to piriformis
- superior branch to gluteus minimus
- inferior branch to gluteus medius/minimus, tensor fascia latae

29

inferior gluteal n

L5-S2
- goes through greater sciatic foramen, inferior to piriformis
- supplies gluteus maximus

30

composition of sciatic n

anterior division L4-S3
posterior division L4-S2

31

largest branch sacral plexus

sciatic n
also largest n in body

32

what is supplied by sciatic n

posterior leg M
all M leg, foot, skin foot
most skin leg
all joints in LE

33

what a accompanies the sciatic n in gluteal region

inferior gluteal a
also the posterior femoral cutaneous n

34

2 phsyiologic n of sciatic (1 anatomic n)

tibial - anteiror L4-S3
common peroneal L4-S2

35

posterior femoral cutaneous (off sciatic n)

S2-3A or S1/2 P

36

branches off the posterior femoral cutaneous

gluteal branches -- inferior cluneal [lateral gluteus maximus]
perineal branches (medial to proximal thigh, perineusm. scrotum, base penis/labia majora)
femoral branches (skin posterior/medial thigh and popliteal fossa)
sural branches (skin distal popliteal fossa)

37

coccygeal plexus

part S4, S5 and coccygeal anterior rami