Lumbar Sacral Stuff

Question 1

Subcostal N level

Answer 1

• Ventral rami T12

Question 2

Iliohypogastric N level

Answer 2

• V. rami L1

Question 3

Ilioinguinal N aka sup inguinal n level

Answer 3

• V. rami L1

Question 4

Lumbosacral trunk level

Answer 4

-V. rami of L5 and bit of L4

Question 5

Femoral N level

Answer 5

• Posterior division of Ventral rami L2-L4

Question 6

Genitofemoral N level

Answer 6

• Anterior division of Ventral rami L1 and L2

Question 7

Obturator N level

Answer 7

• Ant. division of V. rami L2-L4

Question 8

Superior gluteal N level

Answer 8

• Post division of V rami L4-S1

Question 9

Inferior gluteal N level

Answer 9

• Post division of V rami L5-S2

Question 10

Common peroneal (fibular) N level-

Answer 10

Post. division of V rami L4-S2

Question 11

Tibial N level

Answer 11

• Ant division of V rami L4-S3

Question 12

Pudendal N level-

Answer 12

Ant division of V rami S2-S4

Question 13

Lateral femoral cutaneous N level

Answer 13

-L2-L3

Question 14

Post. femoral cutaneous N level-

Answer 14

S1-S3

Question 15

L4 dermatome area?

Answer 15

big toe to back of foot

Question 16

L5 dermatome area?

Answer 16

Digits 2-4 to back of foot

Question 17

L6 dermatome area?

Answer 17

Digit 5 to back of foot

Question 18

Femoral branch of genitofemoral n innervates?

Answer 18

sensory to upper medial thigh

Question 19

Genital branch of genitofemoral n innervates?

Answer 19

cremasteric m (internal oblique) through inguinal canal *cremasteric reflex and sensory to skin by superior ring

Question 20

What goes through greater sciatic foramen above piriformis?

Answer 20

Sup. gluteal vessels and nerves

Question 21

What goes through greater sciatic foramen below piriformis?

Answer 21

Inf. gluteal vessels and n, inf pudendal vessels, pudendal n, post. fem. cut. n, n to obturator internus, n to quad femoris

Question 22

What goes through lesser sciatic foramen?

Answer 22

Tendon of obturator internus, N to obturator internus, Internal pudendal vessels and Pudendal N

Question 23

Perineal body forms what in males vs females?

Answer 23

Males: levator prostatae Females: pubovaginalis

Question 24

What forms pubic diaphragm?

Answer 24

Coccygeous m (ischiococcygeus m) *attaches to deep surface of sacrospinous ligament, Iliococcygeus *does not attach to ilium. Extends from: tendinous arch to Anocyccgeal raphé and coccyx

Question 25

What does parietal pelvic fascia cover?

Answer 25

deep surface of obturator internus and piriformis Perineal membrane covers what? Deep fascia that covers sphincter urethrae m (urethrovaginalis in F) and deep transversus perinei m

Question 26

Layers: Mid-sagittal through anterior proximal penis

Answer 26

``` Skin Colle’s F Perineal F Bulbospongiosus m Bulb Fascia of penis Tunica albuginea Corpus spongiosum ```

Question 27

F. of penis/clit covers?

Answer 27

Individual erectile columns proximally then all distally

Question 28

Perineal F. aka Deep perineal F. aka Gallaudet’s F covers?

Answer 28

Muscles of erectile tissue then becomes continuous with F. of P/C distally

Question 29

Colle’s F aka Superficial perineal F.-

Answer 29

continuous with Scarpa’s F. Attaches to ischiopubic ramus and edge of UG diaphragm

Question 30

Where is superficial perineal pouch?

Answer 30

B/w Colles F and F. of P/C

Question 31

What does superficial perineal pouch contain?

Answer 31

``` Ischiocavernous m, bulbospongiosus m, superficial transverse perinei m. Crura bulb. ```

Question 32

What is dartos tunic?

Answer 32

“Wrinkly” smooth muscle in dermis that shrivels when cold

Question 33

What is dartos muliebris?

Answer 33

Female equivalent of dartos tunic in labia majorum

Question 34

What nerve responsible for erections and what branch of autonomics?

Answer 34

Cavernous n and parasymp.

Question 35

What are the six lateral hip rotators from sup to inf?

Answer 35

Piriformis, superior gemellus, obturator internus tendon, inferior gemellus, obturator externus, and quadratus femoris

Question 36

Which lateral hip rotator is innervated by post divisions?

Answer 36

Piriformis

Question 37

Gluteus maximus actions-

Answer 37

Lat. rotation and extension

Question 38

Glut. medius actions-

Answer 38

medial rotation and abduction (lateral rotation from medial portion)

Question 39

Glut minimus actions-

Answer 39

medial rotation and abduction

Question 40

Gluteus maximus insertion-

Answer 40

75% IT band and 25% gluteal tuberosity of femur

Question 41

Superior gluteal N innervates?

Answer 41

Gluteus medius, glut. min. and TFL

Question 42

Inferior gluteal N innervates?

Answer 42

Gluteus maximus

Question 43

Superior gluteal A supplies blood to?

Answer 43

Upper branch to gluteus medius and minimus. Lower branch to upper portion of glut. max.

Question 44

Inferior gluteal A supplies blood to?

Answer 44

Lower portion of glut. max and hamstrings.

Question 45

Where is femoral ring and what occurs there?

Answer 45

Medial compartment of femoral sheath aka femoral canal. Femoral hernias