Mm. of the Posterior Ab. Wall & Pelvic Floor

Question 1

Psoas major attachments

Answer 1

from transverse processes of T12-L4 to lesser trochanter of femur

Question 2

psoas major actions

Answer 2

flexion of the thigh at the hip joint

Question 3

psoas major innervation

Answer 3

ventral rami of L1-L3

Question 4

iliacus attachments

Answer 4

from iliac fossa to lesser trochanter of femur

Question 5

iliacus actions

Answer 5

flexion of the thigh at the hip joint

Question 6

iliacus innervation

Answer 6

femoral nerve (L2-L4; posterior division)

Question 7

quadratus lumborum attachments

Answer 7

from 12th rib & transverse processes of L1-4 to iliolumbar ligament & iliac crest

Question 8

quadratus lumborum actions

Answer 8

extension & lateral flexion of the trunk, and fixes the 12th rib during respiration

Question 9

quadratus lumborum innervation

Answer 9

Lumbar plexus ventral rami T12-L3

Question 10

The psoas minor is superficial to

Answer 10

psoas major

Question 11

Piriformis attachments

Answer 11

from sacrum to greater trochanter of femur

Question 12

piriformis actions

Answer 12

lateral rotation of thigh at the hip joint

Question 13

piriformis innervation

Answer 13

nerve to piriformis

Question 14

obturator internus attachments

Answer 14

from obturator membrane to greater trochanter of femur

Question 15

obturator internus actions

Answer 15

• lateral rotation of thigh at the hip joint

Question 16

obturator internus innervation

Answer 16

nerve to obturator internus

Question 17

What 3 muscles make up the levator ani?

Answer 17

Iliococcygeus, pubococcygeus, Puborectalis

Question 18

coccygeus attachments

Answer 18

from ischial spine & sacrospinous ligament to coccyx

Question 19

coccygeus actions

Answer 19

supports & compresses the posterior pelvic floor

Question 20

coccygeus innervation

Answer 20

ventral rami S4-5

Question 21

iliococcygeus attachments

Answer 21

from ischium & tendinous arch of obturator internus to coccyx & midline raphe

Question 22

iliococcygeus action

Answer 22

• support pelvic viscera

Question 23

iliococcygeus innervation

Answer 23

levator ani nerve (S4), inferior rectal nerve (pudendal S3-4), coccygeal plexus

Question 24

pubococcygeus attachments

Answer 24

pubis & tendinous arch of obturator internus to coccyx & midline raphe & walls of prostate or vagina

Question 25

Pubococcygeus actions

Answer 25

• support pelvic viscera & compress vagina

Question 26

Pubococcygeus innervation

Answer 26

• levator ani nerve (S4), inferior rectal nerve (pudendal S3-4), coccygeal plexus

Question 27

puborectalis attachments

Answer 27

pubis & wall of rectum

Question 28

puborectalis actions

Answer 28

maintain fecal continence - control of bowel movements

Question 29

puborectalis innervation

Answer 29

levator ani nerve (S4)

Question 30

Obturator internus attachments

Answer 30

from obturator membrane to greater trochanter of femur

Question 31

Obturator internus actions

Answer 31

lateral rotation of the thigh at the hip joint

Question 32

Obturator internus innervation

Answer 32

n. to obturator internus