nerves misc

Question 1

spinal levels of subcostal n

Answer 1

T12

Question 2

spinal levels of iliohypogastric n

Answer 2

L1

Question 3

spinal levels of ilioinguinal n

Answer 3

L1

Question 4

spinal levels of lateral cutaneous n of thigh

Answer 4

L2-L3

Question 5

spinal levels of femoral n

Answer 5

L2-L4

Question 6

spinal levels of genitofemoral n

Answer 6

L1-L2

Question 7

spinal levels of obturator n

Answer 7

L2-L4

Question 8

general course and function of genital branch of genitofemoral n

Answer 8

Genitofemoral n (combined) pierces psoas major.

Genital branch goes thru deep AND superficial inguinal rings.
Travels inside spermatic cord.

Motor to cremaster.
Sensory to scrotum // labia major and mons pubis.

Question 9

general course and function of femoral branch of genitofemoral n

Answer 9

Genitofemoral n (combined) pierces psoas major.

Femoral branch travels inferior to inguinal ligament.

Sensory to upper anterior thigh.

Question 10

general course and function of ilioinguinal n

Answer 10

Travels alongside spermatic cord.
Passes thru superficial ring only.
NOT inside spermatic cord.

Sensory to skin of lower abdominal wall, scrotum/labia majora.

Question 11

general course and function of iliohypogastric n

Answer 11

Most superficial.
Does not pass thru any inguinal rings.

Sensory to area below umbilicus.

Question 12

greater splanchnic n (synapses on, arteries it travels with, area of referred pain)

Answer 12

Celiac ganglion.

Celiac trunk/foregut arteries.

Epigastric pain.

Question 13

lesser splanchnic n (synapses on, arteries it travels with, area of referred pain)

Answer 13

Superior mesenteric ganglion.

SMA/midgut arteries.

Periumbilical pain.

Question 14

least splanchnic n (synapses on, arteries it travels with, area of referred pain)

Answer 14

Aorticorenal ganglion.

Renal arteries.

Hypogastric pain.

Question 15

Lumbar splanchnic n (synapses on, arteries it travels with, area of referred pain)

Answer 15

Inferior mesenteric ganglion.

IMA/hindgut arteries.

Hypogastric/inguinal pain.

Question 16

referred pain from testes/ovaries

Answer 16

lower abdomen (T11/T12)

Question 17

somatic pain from skin of scrotum

Answer 17

pudendal area

from pudendal n.

Question 18

parasympathetic innervation to large intestine

Answer 18

VAGUS to proximal 2/3 of transverse colon.

PELVIC SPLANCHNIC to distal colon

Question 19

spinal levels of pelvic splanchnic n

Answer 19

S2-S4

Question 20

spinal levels of sciatic n

Answer 20

L4-S3

Question 21

spinal levels of pudendal n

Answer 21

S2-S4

Question 22

spinal level of nerve to levator ani

Answer 22

S3-S4

Question 23

spinal level of nerve to coccygeus

Answer 23

S3-S4

Question 24

superior hypogastric plexus contains sympathetic or parasympathetic nn?

Answer 24

superior hypogastric plexus contains SYMPATHETIC nerves

Question 25

inferior hypogastric plexus contains sympathetic or parasympathetic nn?

Answer 25

inferior hypogastric plexus contains BOTH sympathetic and parasympathetic nerves MIXED AUTONOMIC

Question 26

visceral afferent fibers superior to pain line

Answer 26

follow SYMPATHETIC fibers retrograde

Question 27

visceral afferent fibers inferior to pain line

Answer 27

follow PARASYMPATHETIC fibers retrograde to S1-S2

Question 28

functions of sympathetic autonomic nerves of pelvis/perineum

Answer 28

- vasocontrict - increase sweat secretions - contract male internal urethral sphincter - contract internal anal sphincter - move sperm, stimulate seminal secretions - stimulate lubricating glands

Question 29

functions of parasympathetic autonomic nerves of pelvis/perineum

Answer 29

- vasodilate - contract detrusor muscle (facilitates voiding) - stimulate engorgement of erectile tissues - modulate enteric NS control of distal bowel - inhibit contraction of male internal urethral sphincter - inhibit contraction of internal anal sphincter

Question 30

major nerve of the perineum

Answer 30

pudendal n (S2-S4)

Question 31

somatic efferent nerves of the vagina

Answer 31

Somatic efferent fibers only in lower portion of vagina. Upper portion only has visceral efferent. can only feel pain in lower portion of vagina