Pelvis Flashcards

1
Q

Identify the three parts of the os coxae

A
  • Red: Ischium
  • Black: Pubis
  • Green: Ilium
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2
Q

Pelvic Girdle

A

Ring of bones that connect the vertebral column and femora; bony walls of pelvic cavity

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3
Q

Identify

A
  • red: sacral canal
  • black: auricular surface: forms sacroiliac joint
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4
Q

Identify

A
  • Red: greater sciatic notch
  • Black: Ischial spine
  • Green: Lesser sciatic notch
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5
Q

Identify

A

Auricular surface of ilium

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6
Q

Identify

A
  • Blue: posterior superior iliac spine
  • Red: anterior superior iliac spine
  • Green: iliac tubercle
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7
Q

Identify

A

Ischial tuberosity

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8
Q

Identify

A

Ischial ramus

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9
Q

Identify

A

Pectineal line

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10
Q

Identify

A

Arcuate line of pubis

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11
Q

Identify

A

Pubic tubercle

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12
Q

Identify

A

Pubic crest

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13
Q

Identify these areas

A
  • black: Superior pubic ramus
  • Red: Inferior pubic ramus
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14
Q

Identify

A

symphyseal surface

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15
Q

Pubic symphysis is composed of what two structures?

A
  • pubic ligament
  • interpubic disc
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16
Q

What makes up the border of the two inferior pubic rami? What is the name of the angle between?

A
  • pubic arch
  • subpubic angle
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17
Q

What is the name of the hip joint area of the pelvis?

A

Acetabulum: is it composed of all three sections of os coxae

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18
Q

Name the pelvic girdle ligaments that joins the sacrum to the ileum

A
  • sacroiliac ligaments (anterior and posterior)
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19
Q

Name the pelvic girdle ligaments that connects the lumbar spine to the ilium?

A

Ileolumbar ligament

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20
Q

What are the functions of the sacrospinous ligament and the sacrotuberous ligament?

A

Preent flexion at sacroiliac joints; pull coccyx anteriorly

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21
Q

Identify arrows

A
  • Green: Greater sciatic foramen
  • Red: Lesser sciatic foramen
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22
Q

Identify the foramen, membrane within, and canal formed from the membrane

A
  • Obturator foramen
  • Obturator membrane (red arrows)
  • Obturator canal (green arrow)
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23
Q

Identify

A

Pelvic brim and Superior pelvic aperture

24
Q

Identify red-lined circle

A

Pelvic outlet; inferior pelvic aperture

25
Q

What are the two pelvic girdle divisions? What type of viscera does each hold?

A

Greater pelvis: contains abdominal viscera

Lesser pelvis: contains pelvic viscera

26
Q

Differentiate the pelvic structure between men and women in

  • General structure
  • acetabulum
  • Obturator foramen
  • Pelvic inlet
  • Pubic arch and suprapubic angle
A

Women/Men

  • General structre: thin and light/thick and heavy
  • Acetebulum: small/large
  • Obturator formen: Oval/Round
  • Pelvic brim: Round, wide/Heart shaped, narrow
  • Pubic arch: wider (>80 deg)/narrower(<70 deg)
27
Q

In females, the peritoneum and peritoneal cavities create what two pouches?

A
  • vesicouterine pouch
  • rectouterine pouch
28
Q

In males, the peritoneum and peritoneal cavities form what pouch?

A

Rectovesical pouch

29
Q

What is the puborectalis muscle’s role in defecation?

A
  • anorectal flexure kept at 90 º -> continence maintained via tonic or phasic contraction of puborectalis
  • During defecation, puborectalis muscle relaxes and anorectal junction straightens to allow release of feces
30
Q

What are the 3 levator ani muscles

A
  • Puborectalis m.
  • Pubococcygeus m.
  • Ileococcygeus m.
31
Q

Imjury to pelvic floor during childbirth primarily affects which muscle? What is a consequence?

A
  • Pubococcygeus : supports urethra, vagina, and anal canal
  • Urinary stress incontinence: dribbling of urine when intra-abdominal pressure is raised (coughing; lifting)
32
Q

What are the three arteries that come off of the internal iliac arteries posteriorly and give blood to the pelvis?

A
  • Iliolumbar a.
  • Lateral sacral a.
  • Superior gluteal a.

*branches are identified by organ/region they supply, not branchind pattern or order

I Love Going places in my very own underwear

33
Q

What arteries come off anteriorly of the internal iliac artery and supply blood to pelvis of a female?

A
  • Inferior Gluteal a.
  • Internal Pudendal a.
  • Uterine a. (Inferior Vesical in males)
  • Middle rectal a.
  • Vaginal a.
  • Obturator a.
  • Umbilical a

I Love (Going Places In My Very Own Underwear)

34
Q

Umbilical artery terminates as what ligament?

A

Median umbilical ligament

35
Q

What are the substitutions for the uterine and vaginal arteries off the internal iliac artery in males?

A
  • Inferior vesicle a.
  • Prostatic branch a.
36
Q

What three plexus are formed off of the internal iliac vein?

A
  • Pampiniform plexus
  • Vesicular venous plexus
  • Prostatic venous plexus
37
Q

What veins (plexus) wraps around the spermatic cord and drains into the internal iliac vein

A

pampiniform plexus

38
Q

What plexus supplies somatic nerves of the pelvis? What is the solo nerve outside of the plexus that also supplies somatic nerves of pelvis?

A
  • Sacral plexus
  • Obturator n. (L2-L4) exits to Lower Extremity
39
Q

How is the sacral plexus connected to the lumbar plexus?

A

Via the lumbosacral trunk

40
Q

The superior gluteal n. and Pudendal n. are part of what plexus?

A
  • Branches of sacral plexus
41
Q

What is the main nerve of the perineum and chief sensory nerve of external genitalia?

A

Pudendal n. from Sacral plexus

42
Q

What fibers contain purely sympathetic innervation of the pelvis?

A

Sacral paravertebral ganglia-> sacral splanchnic nn (post ganglionic) -> superior hypogastric plexus

43
Q

What fibers contain mixed (sympathetic and parasympathetic) to the pelvis?

A

Inferior hypogastric plexus

44
Q

What provides parasympathetic innervation to the pelvis?

A

pelvic splanchnic nerves (S2-4)

45
Q

Sympathetic innervation has what response during sex and on bladder/rectal peristalsis?

A
  • Vasomotion
  • Contraction of internal organs during orgasm
  • inhibit rectal peristalsis
46
Q

Parasympathetic innervation has what response of bladder/rectal peristalsis and erection?

A

Stimulate bladder/rectum emtpying; produce erection of external genitalia

47
Q

What is the significance of the pelvic pain line?

A

Corresponds with inferior border of peritoneum (except midway down sigmoid colon)

  • Above line: pain sensation follows sympathetic pathways (abdominopelvic splanchnic nn)
  • Below line: Pain sensation follows the parasympathetic pathways
48
Q

General pelvic drainage pattern

A

internal iliac nodes -> common iliac nodes -> lumbar nodes -> lumbar lymphatic trunks -> Chyle cistern -> thoracic duct

49
Q

Lymph drainage of gonads (testes and ovaries)

A

Lumbar nodes -> lumbar lymphatic trunks -> chyle cistern -> thoracic duct

50
Q

Origin and insertion of Obturator internus m. and fascia

A

O: Obturator membrane

I: greater trochanter

51
Q

Innervation of action of obturator internus

A

N: Nerve to obturator internus

A: lateral rotation of thigh

52
Q

Origin and insertion of piriformis

A

O: Anterior surface of sacrum

I: greater trochanter

53
Q

Innervation and action of piriformis

A

N: Nerve to piriformis

A: lateral rotation of thigh

54
Q

Origin and insertion of coccygeus

A

O: ischial spine

I: inferior end of sacrum

55
Q

Innervation and action of coccygeus

A

N: sacral plexus

A: flex coccyx

56
Q

Levantor Ani: pubococcygeus and iliococcygeus origin, insertion, innervation, action

A

O: Pubic body, ischial spine

I: perineal body, coccyx, walls of viscera

N: nerve to levator ani

A: contract to tighten pelvic floor

57
Q

Levator ani: puborectalis: origin, insertion, innervation, action

A

O: Pubic body

I: surround rectum in a sling

N: nerve to levator ani

A: contract to constrict ano-rectal junction