Nycc Gross Anatomy Ii Lecture Posterior Abdominal Wall And Lumbosacral Plexus

Front 1

List the 6 structures along the posterior abdominal wall (from the lower third of the abdomen).

Back 1

Abdominal Aorta, Gonadal Vessels, Common Iliacs, Ureters, Rectum, Urinary Bladder

Front 2

List the 3 types of bone in the posterior abdominal wall.

Back 2

Lumbar vertebrae, Wing of the Ilium, Sacrum

Front 3

List the 4 muscles of the posterior abdominal wall.

Back 3

Quadratus Lumborum, Psoas Major, Psoas Minor, Iliacus

Front 4

List the 4 fascial compartments of the posterior abdominal wall.

Back 4

Thoracolumbar fascia, Transversalis fascia, Psoas fascia, Renal fascia

Front 5

List the 7 nerves of the posterior abdominal wall.

Back 5

Subcostal, Iliohypogastric, Ilioinguinal, Genitofemoral, Obturator, Lateral femoral cutaneous, Femoral

Front 6

What spinal levels and rami is the lumbar plexus formed from?

Back 6

L1-L4; Ventral Rami

Front 7

What spinal levels is the sacral plexus formed from?

Back 7

S1-S4/S5

Front 8

Halves from what spinal levels join to form the lumbosacral trunk?

Back 8

L4, L5

Front 9

What does the lumbosacral trunk end in?

Back 9

Lumbosacral plexus

Front 10

What spinal levels does the lumbosacral plexus of nerves include fibers from?

Back 10

L4-S3/S4

Front 11

The iliohypogastic nerve has fibers from the _____ _____ _____ and supplies the skin in the _____ region.

Back 11

L1 ventral ramus; Suprapubic

Front 12

The ilioinguinal nerve has fibers from the _____ _____ _____ and innervates skin along the _____ _____, _____ of _____, _____ _____ or _____ _____ and _____ _____.

Back 12

L1 ventral ramus; Proximomedial thigh; Root of penis; Upper scrotum or Mons pubis; Labia majora

Front 13

The genitofemoral nerve has fibers from ___-___ and supplies _____ and _____ skin as well as skin over the _____ _____.

Back 13

L1-L2; Cremaster m.; Scrotal; Femoral triangle

Front 14

The subcostal nerve has fibers from ___ and supplies the skin over the ______ _____ _____ and _____ _____.

Back 14

T12; Anterior gluteal region; Greater trochanter.

Front 15

The lateral femoral cutaneous nerve has fibers from ___-___ and supplies the skin over the _____ _____.

Back 15

L2-L3; Lateral thigh

Front 16

What is the disorder with the main symptom of lateral thigh numbness due to lesion of the lateral femoral cutaneous nerve?

Back 16

Meralgia Paresthetica

Front 17

List the 3 nerves that supply 3 patches of skin along the superior anterior leg just inferior to the pubic crest from lateral to medial.

Back 17

Subcostal n., Genitofemoral n., Ilioinguinal n. (also supplies lateral part of genitalia)

Front 18

What nerve emerges from the medial border of psoas major and enters the thigh via the obturator foramen? What spinal levels does it represent?

Back 18

Obturator n.; L2-L4

Front 19

What nerve innervates adductors of the thigh and innervates a patch of skin medial and above the knee?

Back 19

Obturator n. (L2-L4)

Front 20

What nerve innervates knee extensors and thigh flexors as well as the skin over most of the anteriomedial thigh.

Back 20

Femoral n. (L2-L4)

Front 21

What nerve emerges from the lateral border of psoas major and separates into several anterior femoral cutaneous branches and the saphenous n. either before or after it passes under the inguinal ligament?

Back 21

Femoral n. (L2-L4)

Front 22

The obturator nerve emerges from the _____ border of _____ _____ and enters the _____ via the obturator foramen.

Back 22

Medial; Psoas major; Thigh

Front 23

The femoral nerve emerges from the _____ border of _____ _____ and separates into several anterior _____ _____ branches and the _____ nerve either before or after it passes _____ the _____ ligament.

Back 23

Lateral; Psoas major; Femoral cutaneous; Saphenous; Under; Inguinal

Front 24

What are the branches of the obturator nerve?

Back 24

Anterior, Posterior

Front 25

T1-L2 spinal nerves contain the axons for _____ _____ neurons that leave the spinal cord via the _____ roots and _____ _____ branches in the region.

Back 25

Preganglionic sympathetic; Ventral; White communicating

Front 26

What passes from paravertebral ganglia to adjacent ventral rami?

Back 26

Gray communicating branches (rami communicans)

Front 27

The thoracic _____ trunk passes _____ the _____ _____ ligament and becomes the _____ _____ trunk.

Back 27

Sympathetic; Under; Medial arcuate; Lumbar sympathetic

Front 28

What is the sympathetic trunk (thoracolumbar) a division of?

Back 28

Autonomic nervous system (ANS)

Front 29

What nerve exits via the greater sciatic foramen, emerges from the inferior border of piriformis, and runs to the popliteal fossa and branches into the tibial and common fibular nerves?

Back 29

Sciatic n. (L4-S3)

Front 30

What spinal levels does the sciatic n. have fibers from?

Back 30

L4-S3

Front 31

The sciatic nerve exits via the _____ _____ _____, emerges from the _____ _____ of _____, and runs to the _____ _____ and branches into the _____ and _____ _____ nerves.

Back 31

Greater sciatic foramen; Inferior border of piriformis; Popliteal fossa; Tibial; Common fibular

Front 32

The posterior femoral cutaneous nerve exits via the _____ _____ _____, runs deep to _____ _____, and emerges from its _____ _____.

Back 32

Greater sciatic foramen; Gluteus maximus; Inferior border

Front 33

What nerve exits via the greater sciatic foramen, runs deep to gluteus maxumus, and emerges from its inferior border.

Back 33

Posterior femoral cutaneous n.

Front 34

What spinal levels does the posterior femoral cutaneous nerve have fibers from?

Back 34

S1-S3

Front 35

The nerve to quadratus femoris enters via the _____ _____ _____ and innervates the _____ _____, _____ _____, and _____ _____.

Back 35

Greater sciatic foramen; Hip joint; Inferior gemellus; Quadratis femoris

Front 36

What nerve enters via the greater sciatic foramen and innervates the hip joint, inferior gemellus, and quadratus femoris?

Back 36

Nerve to quadratus femoris

Front 37

What spinal levels does the nerve to quadratus femoris have fibers from?

Back 37

L4-S1

Front 38

The nerve to obturator internus exits via the _____ _____ _____ then re-enters the pelvis via the _____ _____ ____ and innervates _____ _____ and _____ _____.

Back 38

Greater sciatic foramen; Lesser sciatic foramen; Superior gemellus; Obturator internus

Front 39

What spinal levels does the nerve to obturator internus have fibers from?

Back 39

L5-S2

Front 40

The pudendal nerve exits via the _____ _____ _____ then re-enters the pelvis via the _____ _____ _____ and innervates most of the _____.

Back 40

Greater sciatic foramen; Lesser sciatic foramen; Perineum

Front 41

What nerve exits via the greater sciatic foramen then re-enters the pelvis via the lesser sciatic foramen and innervates most of the perineum?

Back 41

Pudendal n.

Front 42

What spinal levels does the pudendal nerve have fibers from?

Back 42

S2-S4

Front 43

What spinal levels does the nerve to levator ani and coccygeus have fibers from?

Back 43

S3,S4

Front 44

What nerve exits via the greater sciatic foramen and emerges along the superior border of piriformis?

Back 44

Superior gluteal n.

Front 45

The superior gluteal nerve exits via the _____ and emerges along the _____ border of _____.

Back 45

Greater sciatic foramen; Superior; Piriformis

Front 46

What spinal levels does the superior gluteal nerve have fibers from?

Back 46

L4-S1

Front 47

What nerve exits via the greater sciatic foramen and emerges along the inferior border of piriformis?

Back 47

Inferior gluteal n.

Front 48

The inferior gluteal nerve exits via the _____ and emerges along the _____ border of _____.

Back 48

Greater sciatic foramen; Inferior; Piriformis

Front 49

What spinal levels does the inferior gluteal nerve have fibers from?

Back 49

L5-S2

Front 50

The nerve to piriformis has fibers from spinal levels ___ and sometimes ___. It exits via the _____.

Back 50

S1; S2; Greater sciatic foramen

Front 51

The perforating cutaneous nerve has fibers from spinal levels ___-___ and it passes ______ the _____ _____.

Back 51

L5-S2; Through; Sacrotuberous Ligament

Front 52

What nerve passes through the sacrotuberous ligament?

Back 52

Perforating cutaneous n.

Front 53

List the 2 nerves of the lumbosacral plexus with mixed anterior and posterior divisions.

Back 53

Sciatic n. (L4-S3), Posterior femoral cutaneous n. (S1-S3)

Front 54

List the 4 nerves of the lumbosacral plexus derived from anterior divisions.

Back 54

Nerve to quadratus femoris (L4-S1), Nerve to obturator internus (L5-S2), Pudendal n. (S2-S4, Nerve to levator ani and coccygeus

Front 55

List the nerves of the lumbosacral plexus derived from posterior divisions.

Back 55

Superior gluteal n. (L4-S1), Inferior gluteal n. (L5-S2), Nerve to piriformis (S1 sometimes with S2), Perforating cutaneous n. (L5-S2)

Front 56

What are the superficial nerves of the gluteal region called?

Back 56

Cluneal nerves

Front 57

Dermatomes _____ with themselves and cutaneous nerve distributions.

Back 57

Overlap

Front 58

The _____ cluneal nerves have fibers from lateral cutaneous branches of dorsal rami of L1-L4.

Back 58

Superior

Front 59

The _____ cluneal nerves have fibers from lateral cutaneous branches of dorsal rami of S1-S3.

Back 59

Middle

Front 60

The _____ cluneal nerves have fibers from ventral rami of S1-S3.

Back 60

Inferior

Front 61

The inferior gluteal nerve has fibers from between the ___-___ _____ _____.

Back 61

S1-S2 ventral rami

Front 62

The internal pudendal nerve has fibers from between the lumbosacral trunk (__-__) to the ___ _____ _____.

Back 62

L4-L5 to the S1 ventral ramus