Unit 5 Pelvis

Question 1

rectus abdominus origin

Answer 1

pubic symphysis and pubic crest

Question 2

rectus abdominus insertion

Answer 2

xiphoid process and 5th to 7th costal cartilages

Question 3

rectus abdominus nerves

Answer 3

thoracoabdominal nerves ant rami T6- T12

Question 4

rectus abdominus actions

Answer 4

flexes trunk (lumbar vertebrae) and compresses abdominal viscera; stabilizes and controls tilt of pelvis

Question 5

internal oblique origin

Answer 5

thoracolumbar fascia, anterior 2/3 of iliac crest and connective tissue deep to lateral 1/3 of inguinal ligament

Question 6

internal oblique insertion

Answer 6

inferior borders of 10-12th ribs, linea alba, and pectin pubis via falx inguinalis

Question 7

internal oblique innervation

Answer 7

thoracoabdominal nerves T6-T12 ant rami and 1st lumbar nerves

Question 8

internal oblique action

Answer 8

compression AND support of abdominal viscera; flexion and rotation of trunk

Question 9

external oblique origin

Answer 9

external surfaces of 5th through 12th ribs

Question 10

external oblique insertion

Answer 10

linea alba, pubic tubercle, and anterior 1/2 of iliac crest

Question 11

external oblique innervation

Answer 11

thoracoabdominal nerves T7-T11 ant rami AND subcostal nerve

Question 12

external oblique action

Answer 12

compression and support of abdominal viscera; flexion and rotation of the trunk

Question 13

transversus abdominus origin

Answer 13

internal surfaces of 7th through 12th costal cartilages, thoracolumbar fascia, iliac crest and connective tissue deep to lateral third of inguinal ligament

Question 14

trans. abd. insertion

Answer 14

linea alba with aponeurosis of internal oblique, pubic crest and pecten pubis via conjoint tendon

Question 15

trans abd. nerve

Answer 15

thoracoabdominal nerves T6-T12 and 1st lumbar

Question 16

trans abd. action

Answer 16

compression and support of abdominal viscera

Question 17

quadratus lumborum origin

Answer 17

medial half of anterior border of 12th ribs; tips of lumbar transverse processes

Question 18

QL insertion

Answer 18

iliolumbar L. and internal lips of iliac crest

Question 19

QL innervation

Answer 19

anterior branches of T12, L1-L4

Question 20

QL action

Answer 20

Extends and laterally flexes vertebral column; fixes 12th rib during inspirtation

Question 21

iliacus origin

Answer 21

Superior two thirds of iliac fossa, ala of sacrum and anterior sacroiliac ligaments

Question 22

iliacus insertion

Answer 22

tendon of psoas major; lesser trochanter and shaft inferior

Question 23

iliacus innervation

Answer 23

femoral n. L2 L3 L4

Question 24

iliacus action

Answer 24

flexes thigh and stabilizes hip joint and acts with psoas major

Question 25

psoas major origin

Answer 25

Transverse processes of lumbar vertebrae; sides and bodies of T12- L5 vertebrae and IVD

Question 26

psoas major insertion

Answer 26

LT of femur

Question 27

psoas major innervation

Answer 27

anterior rami L1 L2 L3

Question 28

psoas major action

Answer 28

Inferiorly with iliacus, flexes thigh; acting superiorly it flexes vertebral column laterally; balances the trunk; sitting it acts inferiorly to flex trunk

Question 29

psoas minor origin

Answer 29

sides of T12- L1 vertebrae

Question 30

psoas minor insertion

Answer 30

pectineal line, iliopectineal arch

Question 31

psoas minor nerve

Answer 31

ant. rami L1 L2

Question 32

psoas minor action

Answer 32

hip flexion and functional stability