Abdomen OIIA's

Question 1

Origin: External oblique

Answer 1

Outter surface of ribs 5-12

Question 2

Insertion: External oblique

Answer 2

Linea alba, pubic crest, ASIS & iliac crest

Question 3

Innervation: External oblique

Answer 3

Anterior rami of T7-L1

Question 4

Action: External oblique

Answer 4

Rotates trunk to the opposite side & compress abdominal contents

Question 5

Origin: Internal oblique

Answer 5

Thoracolumbar fascia, iliac crest, inguinal ligament

Question 6

Insertion: Internal oblique

Answer 6

Lower margins of ribs 9-12, pubic crest, inguinal ligament

Question 7

Innervation: Internal oblique

Answer 7

Anterior rami of T7-T12

Question 8

Action: Internal oblique

Answer 8

Rotation to the same side & compresses abdominal contents

Question 9

Origin: Transverse abdominis

Answer 9

Thoracolumbar fascia, iliac crest, inguinal ligament, costal cartilages of lower ribs

Question 10

Insertion: Transverse abdominis

Answer 10

Linea alba, pubic crest, pectineal line

Question 11

Innervation: Transverse abdominis

Answer 11

Anterior rami of T7 to T12 and L1

Question 12

Action: Transverse abdominis

Answer 12

Compress abdominal contents

Question 13

Origin: Rectus abdominis

Answer 13

Pubic crest, tubercle, and symphysis

Question 14

Insertion: Rectus abdominis

Answer 14

Costal cartilages of ribs 5-7 & xiphoid process

Question 15

Innervation: Rectus abdominis

Answer 15

Anterior rami of T7-T12

Question 16

Action: Rectus abdominis

Answer 16

Flex vertebral column and compress abdominal wall

Question 17

Origin: Pyramidalis

Answer 17

Front of pubis and pubic symphysis

Question 18

Insertion: Pyramidalis

Answer 18

Linea alba

Question 19

Innervation: Pyramidalis

Answer 19

Anterior ramus of T12

Question 20

Action: Pyramidalis

Answer 20

Tenses linea alba

Question 21

Origin: Psoas major

Answer 21

Bodies of T12-L5 vertebrae, and transverse processes of lumbar vertebrae

Question 22

Insertion: Psoas major

Answer 22

Lesser trochanter of femur

Question 23

Innervation: Psoas major

Answer 23

Anterior rami of L1-L3

Question 24

Action: Psoas major

Answer 24

Hip flexion

Question 25

Origin: Psoas minor

Answer 25

Bodies of T12-L1 vertebrae

Question 26

Insertion: Psoas minor

Answer 26

Pectineal line of the pelvic brim & iliopubic eminence

Question 27

Innervation: Psoas minor

Answer 27

Anterior rami of L1

Question 28

Action: Psoas minor

Answer 28

-Hip flexion -Helps w/ posterior pelvic tilt

Question 29

Origin: Iliacus

Answer 29

Upper two thirds of iliac fossa

Question 30

Insertion: Iliacus

Answer 30

Lesser trochanter of femur

Question 31

Innervation: Iliacus

Answer 31

Femoral nerve (L2-L3)

Question 32

Action: Iliacus

Answer 32

Hip flexion

Question 33

Origin: Quadratus lumborum

Answer 33

Iliac crest and iliolumbar ligament

Question 34

Insertion: Quadratus lumborum

Answer 34

Transverse processes of L1-L4 vertebrae and inferior border of rib 12

Question 35

Innervation: Quadratus lumborum

Answer 35

Anterior rami of T12-L4

Question 36

Action: Quadratus lumborum

Answer 36

Depresses and stabilizes rib 12 during respiration & lateral bending of trunk