Pelvic Walls and Floor Flashcards Preview

Gross Anatomy 2 > Pelvic Walls and Floor > Flashcards

Flashcards in Pelvic Walls and Floor Deck (35):
1

Innominate

2

Pelvis

3

Sacrum

4

Pelvic Boundaries

5

Pelvic Ligaments

Sciatic Foramen

The sacrotuberous and sacrospinous ligaments for the greater sciatic foramen and lesser sciatic foramen by making the notches in the innominate into proper gaps

6

Sacroiliac Joints

Joint types

Plain synovial at the front and more fibrous at the back

7

Wall Muscles - Iliacus

Attachments

Iliac fossa to join psoas as iliopsoas and insert into lesser trochanter of femur

8

Wall Muscles - Iliacus

Function

Hip flexion

9

Wall Muscles - Iliacus

Innervation

Femoral nerve

10

Wall Muscles - Psoas

Attachments

T12-L4 bodies and intervertebral discs (superficial). L1-L5(deep) to join iliacus as iliopsoas -> lesser trochanter of femur

11

Wall Muscles - Psoas

Function

Hip flexion. Bends trunk laterally (one) and raises trunk from a supine position (two)

12

Wall Muscles - Psoas

Innervation

Lumbar plexus diect branches L2-4 anterior rami

13

Wall Muscles - Obturator Externus

Attachements

Outer surface of the obturator membrane to the trochanteric fossa of the femur

14

Wall Muscles - Obturator Internus

Attachments

Inner surface of obturator membrane to the medial surface of the greater trochanter of the femur

15

Wall Muscles - Obturator Internus

Function

 Lateral rotation of the hip

16

Wall Muscles - Obturator Internus

Innervation

Nerve to obturator internus direct from sacral plexus (L5,S1)

17

Wall Muscles - Piriformis

Attachments

Pelic surface of the sacrum to the greater trochanter of the femur

18

Wall Muscles - Piriformis

Function

Lateral rotation of the hip joint

19

Wall Muscles - Piriformis

Innervation

Nerve to piriformis direct branch of sacral plexus (S1,S2)

20

Pelvic Diaphragm

Made up of

Muscular diaphragm with fascial elements supporting - Levator ani and Coccygeus

21

Coccygeus

Attachments

Ischial spine and sacrospinous ligament to the coccyx and inferior sacrum

22

Coccygeus

Function

Supports pelvic viscera and can flex coccyx very slightly

23

Coccygeus

Innervation

Direct branches from sacral plexus (S4,S5)

24

Levator Ani

Pubococcygeus

Most medial fibres. attaching to and supporting the vagina/prostate gland and rectum.

Usually divided into puborectalis, levator prostate and pubovaginalis

25

Levator Ani

Iliococcygeus

More lateral fibres of levator ani, anterior to coccygeus

26

Levator Ani

Function

Supports pelvic viscera. Contracts during expiration and coughing etc, but relaxes to allow urination and defecation. 

27

Pelvic Diaphragm

28

Pubococcygeus

Innervation

Motor innervation from pudendal nerve and nerve to levator ani

29

Puborectalis

Innervation

Is the sling around the rectum. Innervated by pudendal nerve (S2-4) and nerve to levator ani (S4)

30

Iliococcygeus

Innervation

Pudendal nerve and nerve to levator ani

31

Perineal body

What is it composed of?

Fibrous connective tissue

32

Perineal body

What attaches here?

Levator prostate, pubovaginalis, external anal sphincter and perineal muscles attach here

33

Fascia surrounding in pelvis

 

34

Female Peritoneum

35

Male Peritoneum