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203 Theme 2 > Defining The Pelvic Region > Flashcards

Defining The Pelvic Region Flashcards

1
Q

Bones that make the pelvis

A 
Innominate bones (ilium, pubis, ischium)
Sacrum 
Coccyx
Ischial spine
Ischial tuberosity
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2
Q

Innominate bones

A

Ilium
Ischium
Pubis

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3
Q

Ligaments of the pelvis [4]

A

Sacroiliac
Sacrococcygeal
Sacrospinous
Sacrotuberous

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4
Q

Ligaments of the pelvis

-Sacroiliac

A

Between sacrum and ilium

-anterior and posterior components

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5
Q

Ligaments of the pelvis

-Sacrococcygeal

A

Between sacrum to coccyx

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6
Q

Ligaments of the pelvis

-Sacrospinous

A

Between ischial spine and sacrum/coccyx

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7
Q

Ligaments of the pelvis

-Sacrotuberous

A

sacrum to ischial tuberosity

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8
Q

Location of the perineum (in females)

A

Space located at the pelvic inlet and inferior to the pelvic diaphragm

Diamond-shaped surface extending from mons pubis to medial surface of the thighs and posteriorly to gluteal folds

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9
Q

What is enclosed within the deep perineal pouch?[4]

A

Pouch above perineal membrane, towards the pelvis

  • Urethra
  • Vagina (F)
  • Glands: bulbourethral (M)
  • Perineal muscles that act as sphincters: compressor urethra or urethrovaginal sphincter (F)
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10
Q

What is enclosed with the superficial perineal pouch? [4]

A

Pouch that contains muscles to anchor the external genitalia

  • Urethra
  • Vagina and penis roof
  • Glands: Bartholin (F)
  • Perineal muscles: bulbospongiosus, ischiocavernosus
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11
Q

Pelvic cavity

-borders

A 
Borders
Posterior- sacrum/coccyx 
Anterior- pubic symphysis 
Inferior- pelvic floor 
Superior- pelvic brim 
Lateral- obturator internus m
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12
Q

Pelvic cavity

-contents

A

Reproductive organs/tracts
Bladder
Rectum

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13
Q

Pelvic musculature

A

Lines the wall

  • Piriformis
  • obturator internus

Lines the floor

  • coccygeus
  • levator ani (iliococcygeal, pubococcygeal, puborectalis)
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14
Q

Piriformis muscle

  • origin
  • course
  • insertion
  • action
A

Muscle of the pelvic wall

Origin
-Anterior surface of the sacrum

Course

  • Projects laterally into the greater sciatic foramen
  • over the ischial spine

Insertion
greater trochanter of femur

Action
-Rotation of the leg

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15
Q

Obturator internus

  • origin
  • course
  • insertion
  • action
A

Muscle of the pelvic wall

Origin
-internal surface of the obturator membrane

Course

  • Through the lesser sciatic foramen
  • below the ischial spine

Insertion
-greater trochanter of femur

Action
-Rotation of the femur

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16
Q

Pubococcygeus

  • Origin
  • insertion
  • Action
A

Muscle of the pelvic floor

Origin
Posterior of pubic bone

Insertion
-Lateral fibres of coccyx

Action
-Supports the viscera in pelvic cavity

17
Q

Puborectalis

  • Origin
  • insertion
  • Action
A

Muscle of pelvic floor

Origin
-Posterior pubic bone, slings around rectalis

Insertion
-Behind the rectum

Action
-foecal continence and defecation,

18
Q

Coccygeal muscle

A

Muscle of pelvic floor

Origin
-Ischial spine

Insertion
-inferior end of the sacrum + coccyx

19
Q

Iliococcygeus

  • origin
  • insertion
  • action
A

Muscle of pelvic floor

Origin
-tendinous arch- this is a feature of this muscle

insertion
- to the annococcygeal body

20
Q

Nerve root of sciatic nerve

A

L4-S3

21
Q

Nerve root of inferior gluteal

A

L5-S2

22
Q

Nerve root of superior gluteal nerve

A

L4-S1

23
Q

Nerve roots of the pelvic splanchnic nerves

A

S2-4

24
Q

Coccyx

A

Posterior bone of the pelvis

Formed of 4 fused coccygeal bones

25
Q

Sacrum

A

Posterior aspect of pelvis

-formed by fusion of the 5 sacral bones fused together

26
Q

Pelvic brim

A

Border seperating the true/lesser and false/greater pelvis

consists of right and Left linea terminalis

  • arcuate
  • pectineal line
27
Q

Blood supply of the pelvis

A

Anterior division of the internal iliac (branches-uterine, vesical, internal pudendal)

Gonads supplied by gonadal branch from abdominal aorta

28
Q

Venous drainage of the pelvis

A 
Internal iliac (to common iliac veins)
Gonadal to IVC [from right gonadal] or L renal vein
29
Q

Somatic Innervation of the pelvis

A

Somatic plexuses (L4-Co)

  • Lumbosacral (L4-S4)
  • Coocygeal (S4-Co)

Function: Motor [to muscle] and sensory

  • sciatic nerve
  • sup/inf gluteal
  • pudendal)
30
Q

Nerve root of pudendal nerve

-function

A

S2, S3, S4

-innervates pelvic floor muscles

31
Q

Visceral Innervation of Pelvic Regions

A

Visceral Plexuses

-parasympathetic- pelvic splanchnic nerves
Action: Erection

Sympathetic

  • sacral sympathetic trunk [paraverterbral]
  • sup & inf hypogastric plexuses [prevertebral]
  • Action: Ejaculation

203 Theme 2 (22 decks)

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