Lecture 25 (8-7-14) Flashcards Preview

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Flashcards in Lecture 25 (8-7-14) Deck (22):
1

What is the Pelvic arterial supply?

  • Internal illiac (from common illiac)
  • Gonadal a (from aorta)
  • Median Sacral a (from aorta)
  • Superior rectal a (from inferior mesenteric)

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2

What are the branches of the posterior division of the internal iliac artery including what they do.

ALL SOMATIC BRANCHES!! (POST DIV)

  • Illiolumbar branches ascend
    • lumbar a
    • iliiac branch
  • Lateral sacral aa
    • lots of branches that go out the sacral foramina
  • Superior Gluteal A
    • leaves between LS trunk and S1
    • (Posterior and superior both starts with con.)

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3

What are the branches of the anterior division of internal iliac?

ANTERIOR IS BOTH Visceral and somatic

  • Umbilical a (v) -->superior vesical (V)
  • Obturator (s) (supply medial compart thigh)
  • Uterine/ aterty to vas deferns (v)
  • Inferior vesical/ vaginal (v) (bladder, seminal vesical, prostate)
  • Internal Pudendal (s) (perineum)
  • Middle Rectal (v)
  • Inferior Gludeal a (s?) 
    • (Inf and Ant both start with vowles!)

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4

What does the internal pudendal artery do?

Supply perineum 

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5

What is the venous drainage of the rectum?

BOTH portal and systemic 

  1. Superior Rectal vv. --> inferior mesenteric--> portal vein
  2. Middle rectal vv--> interinal illiac v. --> IVC
  3. Inferior rectal vv--> internal pudendal v--> internal illiac v--> IVC

6

What are the nerves in the lumbosacral plexus and what spinal cord segmends are they?

  1. Superior Gluteal n (L4-S1)
  2. Inferior Gluteal (L5-S2)
  3. Nerve to Piriformis (S1-S2)
  4. Sciatic (L4-S3)
    • Tibial part (L4-S3)
    • Fibular part (L4-S2)
  5. N. to Quadratis femoris (L4-S1)
  6. N. to Obturator Internus (L5-S2)
  7. Posterior Femoral Cutaneous (S2-S3)

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7

Identify these nerves

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  1. Superior Gluteal n (L4-S1)
  2. Inferior Gluteal (L5-S2)
  3. Nerve to Piriformis (S1-S2)
  4. Sciatic (L4-S3)
    • Tibial part (L4-S3)
    • Fibular part (L4-S2)
  5. N. to Quadratis femoris (L4-S1)
  6. N. to Obturator Internus (L5-S2)
  7. Posterior Femoral Cutaneous (S2-S3)

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8

What are the roots of pelvic splanchnics and what do they do?

S2-S4

parasympathetics to pelvis

9

What is the innervation of the levator ani muscle?

  • Levator ani muscles (puboreectalis, puboccoygeus and iliococcygeus)--> nerve to levator ani (s4)
  • Coccygeus muscle --> S4, S5 

(super gluteal nerve??)

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10

  1. What spinal cord segments is the pudendal nerve?
  2. What is the path of pundendal nerve what does it innervate?
  3.  

  1. "S2,3,4 keeps your ass off the floor"
  2. our greater sciatic foramen--> back in lesser sciatic foramen--> give branches to perineal structures. 

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11

Ischiovernosus muscle

  1. ischial tuberosity--> ??
  2. muscular (deep) br of perineal n--> f/ pudendal nerve (s2-S4) {same as bulbospongiosus}
  3. compresses veins to keep erection 

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12

Bulbospongiosus m

  1. Perineral body--> clitoral prepuce
  2. Muscular branch of perineal n--> from pudendal n (S2-S4) {same as ischiocavernosus
  3. helps erection clitoris and bulb of vestibule 

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13

Superficial Transverse Perineal muscle

  1. iscial tuberosity-->
  2. Deep branch of perineal nerve--> pudendal nerve (S2-S4)
  3. Supports pelvic floor

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14

Deep Transverse Perineal 

  1.  
  2. Deep br of perineal n--> pudendal nerve (S2-S4
  3. supports floor 
  4. (same as superficial)

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15

Sphincter Urethae Muscle. 

  • Deep branch of the perineal nerve, branch of pudendal nerve (S2-S4)
  • Compresses urethrae to maintain urinary continence.

16

Urethrovaginal Muscle


  • Deep branch of the perineal nerve, branch of pudendal nerve (S2-S4)
     



  • Compresses urethrae to maintain urinary continence.
     

17

Compressor Urethrae Muscle


  • Deep branch of the perineal nerve, branch of pudendal nerve (S2-S4)
     



  • Compresses urethrae to maintain urinary continence.
     

18

What is the autonomic Nervous system in the pelvis?

Sympathetics:

Lumbar and sacral splanchnics

 

Parasympathetics

S2-4 and Pelvic splanchincs

19

What are the Autonomic Nerves in the Pelvic Viscera?

Sympathetics L1-S2 spinal levels f/ sympathetic chain

  • Hypogastric nn
  • Lumbar splanchnic nn
  • Sacral Splanchnic nn

 

Parasympathetics:

  • Pelvic splanchnic from S2-S4

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20

What is the function of sympathetics in the abdomen and pelvis?

-Inhibit peristalsis

-Vasoconstriction

-Contract internal urethral  sphincter

-Increase sphincter tone

-Release adrenalin into blood stream

-Ejaculation

21

What is the function of parasympathetics in the abdomen and pelvis?

  1. peristaliss
  2. vasodialation
  3. decrease sphinctor tone
  4. increase digestive secreations
  5. contract detrusor muscle 
  6. erection 

22

How do general visceral afferents travel back? where are they coming from and going to?

organ--> spinal cord with autonomic fibers supply specific organ

 

from thoracic and abdominal organs with SYMPATHETICS

from PELVIC ORGANS with PARASYMATHTICS