Pelvic Walls and Floor

Question 1

Innominate

Answer 1

Question 2

Pelvis

Answer 2

Question 3

Sacrum

Answer 3

Question 4

Pelvic Boundaries

Answer 4

Question 5

Pelvic Ligaments

Sciatic Foramen

Answer 5

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

Question 6

Sacroiliac Joints

Joint types

Answer 6

Plain synovial at the front and more fibrous at the back

Question 7

Wall Muscles - Iliacus

Attachments

Answer 7

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

Question 8

Wall Muscles - Iliacus

Function

Answer 8

Hip flexion

Question 9

Wall Muscles - Iliacus

Innervation

Answer 9

Femoral nerve

Question 10

Wall Muscles - Psoas

Attachments

Answer 10

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

Question 11

Wall Muscles - Psoas

Function

Answer 11

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

Question 12

Wall Muscles - Psoas

Innervation

Answer 12

Lumbar plexus diect branches L2-4 anterior rami

Question 13

Wall Muscles - Obturator Externus

Attachements

Answer 13

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

Question 14

Wall Muscles - Obturator Internus

Attachments

Answer 14

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

Question 15

Wall Muscles - Obturator Internus

Function

Answer 15

Lateral rotation of the hip

Question 16

Wall Muscles - Obturator Internus

Innervation

Answer 16

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

Question 17

Wall Muscles - Piriformis

Attachments

Answer 17

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

Question 18

Wall Muscles - Piriformis

Function

Answer 18

Lateral rotation of the hip joint

Question 19

Wall Muscles - Piriformis

Innervation

Answer 19

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

Question 20

Pelvic Diaphragm

Made up of

Answer 20

Muscular diaphragm with fascial elements supporting - Levator ani and Coccygeus

Question 21

Coccygeus

Attachments

Answer 21

Ischial spine and sacrospinous ligament to the coccyx and inferior sacrum

Question 22

Coccygeus

Function

Answer 22

Supports pelvic viscera and can flex coccyx very slightly

Question 23

Coccygeus

Innervation

Answer 23

Direct branches from sacral plexus (S4,S5)

Question 24

Levator Ani

Pubococcygeus

Answer 24

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

Usually divided into puborectalis, levator prostate and pubovaginalis

Question 25

Levator Ani Iliococcygeus

Answer 25

More lateral fibres of levator ani, anterior to coccygeus

Question 26

Levator Ani Function

Answer 26

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

Question 27

Pelvic Diaphragm

Answer 27

Question 28

Pubococcygeus Innervation

Answer 28

Motor innervation from pudendal nerve and nerve to levator ani

Question 29

Puborectalis Innervation

Answer 29

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

Question 30

Iliococcygeus Innervation

Answer 30

Pudendal nerve and nerve to levator ani

Question 31

Perineal body What is it composed of?

Answer 31

Fibrous connective tissue

Question 32

Perineal body What attaches here?

Answer 32

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

Question 33

Fascia surrounding in pelvis

Answer 33

Question 34

Female Peritoneum

Answer 34

Question 35

Male Peritoneum

Answer 35