nerves misc Flashcards

1
Q

spinal levels of subcostal n

A

T12

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2
Q

spinal levels of iliohypogastric n

A

L1

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3
Q

spinal levels of ilioinguinal n

A

L1

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4
Q

spinal levels of lateral cutaneous n of thigh

A

L2-L3

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5
Q

spinal levels of femoral n

A

L2-L4

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6
Q

spinal levels of genitofemoral n

A

L1-L2

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7
Q

spinal levels of obturator n

A

L2-L4

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8
Q

general course and function of genital branch of genitofemoral n

A

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.

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9
Q

general course and function of femoral branch of genitofemoral n

A

Genitofemoral n (combined) pierces psoas major.

Femoral branch travels inferior to inguinal ligament.

Sensory to upper anterior thigh.

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10
Q

general course and function of ilioinguinal n

A

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

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

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11
Q

general course and function of iliohypogastric n

A

Most superficial.
Does not pass thru any inguinal rings.

Sensory to area below umbilicus.

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12
Q

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

A

Celiac ganglion.

Celiac trunk/foregut arteries.

Epigastric pain.

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13
Q

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

A

Superior mesenteric ganglion.

SMA/midgut arteries.

Periumbilical pain.

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14
Q

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

A

Aorticorenal ganglion.

Renal arteries.

Hypogastric pain.

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15
Q

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

A

Inferior mesenteric ganglion.

IMA/hindgut arteries.

Hypogastric/inguinal pain.

L1-L2

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16
Q

referred pain from testes/ovaries

A

lower abdomen (T11/T12)

17
Q

somatic pain from skin of scrotum

A

pudendal area

from pudendal n.

18
Q

parasympathetic innervation to large intestine

A

VAGUS to proximal 2/3 of transverse colon.

PELVIC SPLANCHNIC to distal colon

19
Q

spinal levels of pelvic splanchnic n

A

S2-S4

20
Q

spinal levels of sciatic n

A

L4-S3

21
Q

spinal levels of pudendal n

A

S2-S4

22
Q

spinal level of nerve to levator ani

A

S3-S4

23
Q

spinal level of nerve to coccygeus

A

S3-S4

24
Q

superior hypogastric plexus contains sympathetic or parasympathetic nn?

A

superior hypogastric plexus contains SYMPATHETIC nerves

25
Q

inferior hypogastric plexus contains sympathetic or parasympathetic nn?

A

inferior hypogastric plexus contains BOTH sympathetic and parasympathetic nerves

MIXED AUTONOMIC

26
Q

visceral afferent fibers superior to pain line

A

follow SYMPATHETIC fibers retrograde

27
Q

visceral afferent fibers inferior to pain line

A

follow PARASYMPATHETIC fibers retrograde to S1-S2

28
Q

functions of sympathetic autonomic nerves of pelvis/perineum

A
  • vasocontrict
  • increase sweat secretions
  • contract male internal urethral sphincter
  • contract internal anal sphincter
  • move sperm, stimulate seminal secretions
  • stimulate lubricating glands
29
Q

functions of parasympathetic autonomic nerves of pelvis/perineum

A
  • 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
30
Q

major nerve of the perineum

A

pudendal n (S2-S4)

31
Q

somatic efferent nerves of the vagina

A

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

can only feel pain in lower portion of vagina

32
Q

lumbar splanchnic n. roots

A

L1-L2