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Endo/Repro Exam 2 > Nerves 0.0 > Flashcards

Nerves 0.0 Flashcards

1
Q

Ilioinguinal N. (___)

A

L1;

branches into anterior scrotal N./ anterior labial N

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2
Q

Genitofemoral N. ___

A

L1-2

Supplies scrotum in males and labia majora in females

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3
Q

Obturator N.

A

L2-L4

Innervates the. medial thigh muscle

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4
Q

Lumbosacral Trunk

A

L4-L5

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5
Q

What is supplied by the superior gluteal nerve?

A

L4-S1

Gluteus medius and gluteus minimus.

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6
Q

Sacral Plexus ____

A

L4-S4

  1. Superior gluteal N. (L4-S1)
  2. Inferior gluteal N. (L5-S2)*
  3. Nerve to the quadratus femoris M. (L4-S1)
  4. Nerve to the obturator internus M. (L5-S2)*
  5. Nerve to the piriformis M. (S1-S2)
  6. Perforating Cutaneous Branches (S1-S3) -> butt. and upper posterior thigh
  7. 1 Perforating Cutaneous Branches (S2-3) -> to the Medial Buttock
  8. Pudendal N. (S2-S4)

  • Inferior rectal N- innervates. the. anal canal inferior to the pectinate. line and external sphincter m.
  • Dorsal N. of the Penis
  • Dorsal N. of the clitoris
  • Deep perineal N; supplies
    • superior transverse perineal Ms,
    • deep transverse perineal Ms,
    • ischiocavernosus m.,
    • bulbospongiosus m.,
    • vaginal vestibule and
    • most inferior part of the vagina.
  • Superficial perineal N
    • Posterior scrotal N. (posterior part of scrotum)
    • Posterior Labial N. (posterior aspect of labia majora)

  1. Sciatic N (L4-S3) (lower extremity)
  2. Pelvic splanchnic N. (L4-S3)
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7
Q
  1. Superior gluteal N. (___)
  2. Inferior gluteal N. (___)
  3. Nerve to the quadratus femoris M. (____)
A
    1. Superior gluteal N. (L4-S1)
      * Glut med, glut min and TFL
    1. Inferior gluteal N. (L5-S2)
      * Glut max.
    1. Nerve to the quadratus femoris M. (L4-S1)
      * ​quad femoris
      * inferior gemellus M
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8
Q
  1. Nerve to the quadratus femoris M. (____)
  2. Nerve to the obturator internus M. (____)
  3. Nerve to the piriformis M. (____)
A
  1. Nerve to the quadratus femoris M. (L4-S1)
  2. Nerve to the obturator internus M. (L5-S2)
  • obturator internus m
  • Superior. gemellus m.
  1. Nerve to the piriformis M. (S1-S2)
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9
Q
  1. Posterior femoral Cutaneous N (___)
  2. 1 Perforating Cutaneous Branches (___)
A

6. Posterior femoral Cutaneous N (S1-S3) -> butt. and upper posterior thigh

6.1 Perforating Cutaneous Branches (S2-3) -> to the Medial Buttock

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10
Q

7. Pudendal N. (___)

A
  • inferior rectal N.
    • anal canal below the pectinate line and external sphincter m.
  • Dorsal N of the penis.
    • ​penis
    • external urethral sphincter m
  • Dorsal N. of the clitoris
    • ​clitoris
    • external urethral sphincter m
  • Superior perineal N.
    • Posterior scrotal N.
    • Posterior labial N.
  • Deep perineal N.
    • Supply: superior transverse perineal M, deep transverse perineal M, ischiocaverosus m., bulbospongiosus m., vaginal vestibule and inferior most part of vagina.
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11
Q
  1. Sciatic N (___)
  2. Pelvic splanchnic N. (___)
A

Sciatic N (L4-S3) (lower extremity)

Pelvic splanchnic N. (S2-S4)

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12
Q

Coccygeal Plexus (_____)

A

S4-S5 and coccygeal N.

  1. Anococcygeal N- innervates a small area of skin in coccygeal region
  2. Nerve to levator ani (S4)
  3. Nerve to the coccygeus (S4-S5)
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13
Q

The superior hypogastric plexus gives rise to what three other plexuses?

A
  1. Ureteric plexus.
  2. Testicular plexus.
  3. Common iliac plexus.
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14
Q

What are the branches of the sacral plexus?

A
  1. Sciatic nerve.
  2. Pudendal nerve.
  3. Superior gluteal nerve.
  4. Inferior gluteal nerve.
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15
Q

From which spinal nerves do the somatic nerves of the lower limb, pelvis, and perineum arise?

A
  1. L4-L5 (lumbar plexus contribution).
  2. S1-Co
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16
Q

What is the function of the pudendal nerve?

A

Innervation of the

  1. perineum
  2. sensory afferents for the external genitalia and
  3. anal canal (below the pectinate line)
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17
Q

The pudendal nerve enters the perineum via which structure?

A

The lesser sciatic foramen – contained in the pudendal canal.

18
Q

What provides the sympathetic and parasympathetic contributions to the inferior hypogastric plexus?

A

Sympathetic:

  1. R/L hypogastric nerves (from the superior hypogastric plexus)
  2. sacral splanchnic nerves.

Parasympathetic:

  1. pelvic splanchnic nerves.
19
Q

Where to the superior rectal, middle rectal, and inferior rectal arteries come from respectively?

A
  • Inferior mesenteric artery -> superior rectal artery.
  • Anterior division of the internal iliac artery -> middle rectal artery.
  • Internal pudendal artery -> inferior rectal artery.
20
Q

The lumbosacral plexus receives contributions from which anterior rami?

A

L4-L5 and

S1-S4

21
Q

What is the nerve supply, blood supply, venous supply, and lymphatic drainage above the pectinate line?

A
  1. Nerves: Inferior Hypogastric Plexus.
  2. Blood: Inferior Mesenteric A.
  3. Veins: Superior Rectal Veins (Portal System).
  4. Lymph: Internal Iliac Lymph Nodes
22
Q

What is the nerve supply, blood supply, venous drainage, and lymphatic drainage below the pectinate line?

A
  • Nerves: Inferior Rectal Nerves (somatic).
  • Blood: Internal Iliac
  • Veins: Inferior Rectal Veins (Systemic).
  • Lymph: Superficial Inguinal Lymph Nodes.
23
Q

Which anal sphincter is under voluntary control?

A

The external anal sphincter.

24
Q

From where does the internal urethral sphincter get its innervation?

From where does the external urethral sphincter get its innervation?

A

The inferior hypogastric plexus.

The dorsal n. of. the penis of dorsal. n. of the. clitoris.

25
Q

The median umbilical ligament is attached to what part of the bladder?

A

apex

26
Q

What nervous contribute to the innervation of the ureters?

A
  • The preaortic plexus.
  • Hypogastric plexus.
  • Pelvic splanchnic nerves.
27
Q

Ilioguinal N (L1)

path:

A
    1. Comes. off lumbar. plexus. (L1-L4)
    1. goes into the inguinal canal
    1. Goes into the spermatic cord
    1. Goes into scotom or labia majora
  • Anterior. scrotal N or the anterior labial N
28
Q

Sacral Sympathetic Trunk

A
  • A paravertebral sympathetic trunk that is continuous with the lumbar sympathetic trunk;
  • has 4 paired ganglia and ends inferiorly in the midline at. the ganglion impar, where the L and R paravertebral trunk meet.
29
Q

what is the abdominopelvic Splanchnic N. Originating in the Pelvis

A

sacral splanchnic n

Post-synpatic sympathetic fiber from sacral sympathetic trunk -> inferior hypogastric plexus

30
Q

Intermesenteric Plexus (mixed Sympathetic and

Parasympathetic, Sympathetic and Parasympathetic input from the Superior Mesenteric Plexus, part of the Aortic Plexus, forms the Periarterial Plexus which follow the gonadal arteries, also feeds Sympathetic into the Inferior Mesenteric Plexus and Superior Hypogastric Plexus)

  1. Periarterial Plexus (descends with the Ovarian A.)
    a. Ovarian Plexus (innervates the Uterine Tubes

and Ovaries)

A
31
Q

How will olinger tag Deep/Superficial Perineal N.

A

Superficial perineal N: goes into skin or nothing (a cut nerve)

Deep perineal N: goees into muscle

32
Q

Lumbar Splanchnic N path

A

Lumbar Splanchnic N (presynpatic sympathetic fibers from L1-L5) ->

Inferior mesenteric ganglion, where it synapse on some post-synaptic fibers,

with some post-synaptiv fibers feeding into the superior hypogastric plexus

33
Q

What is a rami communicans

A
  1. Postsynaptic Sympathetic Fibers that leave Sacral Sympathetic Trunk ->
  2. Anteior Rami of Sacral and Coccygeal Spinal Nerve
  3. -> provide Sympathetic Innervation to the Lower Extremity
34
Q

Pelvic Splanchnic N.

A

Presynaptic parasympathetic fibers from S2-4

-run with anterior rami of sacral spinous nerve ->

-> pop out of the sacral spinous nerve->

Meet with sympathetic fibers of hypogastric nerve to form the inferior hypogastric plexus.

35
Q

why is the inferior mesenteric plexus important?

A

it is a conduit: send informariot

Receives sym/parasym info from the superior mesenteric plexus ->

Sends sympathetic into the Inferior Mesenteric Plexus and Superior Hypogastric Plexus)

36
Q

Why is superior hypogastric plexus important?

Sypathetic input from:

Produces the:

Sends:

A

Not mixed: IT. IS SYMPATHETIC

Sypathetic input from:

  1. Lumbar Splanchnic Ns., which go through the intermesenteric ganglion.

Produces the:

  1. Ureteric Plexus
  2. Testicular Plexus, which travel along the Common Iliac As.,

Sends paired Hypogastric Ns. to the Inferior Hypogastric Plexus

37
Q

How do we get sympathetic information. into the inferior hypogastric plexus?

A

Superior mesenteric plexus send sympathetic Hypogastric Ns.

sacral splanchnic

ramus communicans (rami communicantes)

38
Q

Inferior hypogastric plexus (pelvic plexus to rectum and colon)

Type:

Fibers from:

A

MIXED SYMPATHETIC AND PARA

  • Sympathetic from:
    • ​hypogastric nerves
    • sacral splanchnic nerves (come off of sacral sympathetic trunk-> IHP)
    • ramus communicans (come off sacral sympathetic trunk -> anterior rami of sacral spinal N) to send symp info everywhere.
  • Parasympathetic from:
    • pelvic splanchnic nerves (come off of anterior rami of spinal nerves -> IHP)
39
Q

What. does the inferior hypogastric plexus do in F.

A

forms multiple subplexuses called Pelvic Plexuses.

  1. Vesical Plexus -> detrusor and internal urethral sphincter m.
    1. Sympathetic: causes contraction of the Internal Urethral Sphincter M.;
    2. Parasympathetic: contraction of the Detrusor M. and relaxation of the Internal Urethral Sphincter M.
  2. Uterovaginal Plexus-> inn. WITH BOTH PARASYMPATHETIC AND SYMPATHETIC, except erectile tissue
    1. uterus,
    2. vagina,
    3. vestibular glands
    4. erectile tissue
      1. Caveronous Ns-> erection of clit, engorgement of bulbs and increases vaginal secretion
40
Q

What. does the inferior hypogastric plexus do in M.

A

forms multiple subplexuses called Pelvic Plexuses.

  • Vesical Plexus-> detrusor and internal urethral sphincter m.
  • Prostatic plexus-> inn. WITH BOTH SYMPATHETIC AND PARASYMPATHETIC, except in the erectile tissue (only. parasympathetic
    • prostate gland,
    • proximal urethra,
    • ductus deferens,
      • N. to the ductus deferens -> sympathetic: contract urethral sphincter m.
    • ejaculatory ducts,
      • N. to the ejaculatory. ducts-> symp: contraction of the ejaculatory. ducts
    • seminal vesicles
      • N. to the seminal vesicles ->. symp: contraction and secretion of seminal vesicles -> semen
    • erectile tissue
      • Cavernous N (ONLY PARASYMPATHETIC)- > makes erection
41
Q
A

Endo/Repro Exam 2 (17 decks)

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