Exam 4 Muscles Oina

Front 1

External abdominal oblique origin

Back 1

external surfaces of 5th-12th ribs

Front 2

External abdominal oblique insertion

Back 2

linea alba
pubic tubercle
anterior half of iliac crest

Front 3

External abdominal oblique innervation

Back 3

motor fibers in T7-T12 and the iliohypogastric nerve

Front 4

External abdominal oblique action

Back 4

compresses and supports abdominal viscera;
flexes and rotates trunk

Front 5

Internal abdominal oblique origin

Back 5

thoracolumbar fascia
anterior two thirds of iliac crest
connective tissue deep to lateral 1/3 of inguinal ligament

Front 6

Internal abdominal oblique insertion

Back 6

inferior borders of 10-12th ribs
linea alba
pecten pubis via conjoint tendon

Front 7

Internal abdominal oblique innervation

Back 7

motor fibers in T7-T12;
iliohypogastric nerve;
ilioinguinal nerve

Front 8

Internal abdominal oblique action

Back 8

compresses and supports abdominal viscera; flexes and rotates trunk

Front 9

Transversus abdominis origin

Back 9

internal surfaces of 7-12 costal cartilages
thoracolumbar fascia
iliac crest
connective tissue deep to 1/3 of inguinal ligament

Front 10

Transversus abdominis insertion

Back 10

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

Front 11

Transversus abdominis innervation

Back 11

motor fibers in T7-T12
iliohypogastric nerve
ilioinguinal nerve

Front 12

Transversus abdominis action

Back 12

compresses and supports abdominal vescera

Front 13

Rectus abdominis origin

Back 13

pubic symphysis & pubic crest

Front 14

Rectus abdominis insertion

Back 14

xiphoid process and 5th-7th costal cartilages

Front 15

Rectus abdominis innervation

Back 15

T7-T11 and subcostal nerve

Front 16

Rectus abdominis action

Back 16

flexes trunk
compresses abdominal viscera
stabilizes and controls tilt of pelvis (antilordosis)

Front 17

pyramidalis origin

Back 17

pubic crest
(anterior surface of pubis & ant. pubic ligament)

Front 18

pyramidalis insertion

Back 18

linea alba

Front 19

pyramidalis innervation

Back 19

subcostal N

Front 20

pyramidalis action

Back 20

assists rectus abdominis muscle in flexion of vertebral column
draws down linea alba

Front 21

psoas major origin

Back 21

transverse processes of lumbar vertebrae;
sides of bodies of T12-L5 vertebrae and intervening intervertebral discs

Front 22

psoas major insertion

Back 22

by a strong tendon to lesser trochanter of femur

Front 23

psoas major innervation

Back 23

L2-L4

Front 24

psoas major action

Back 24

flexes thigh and vertebral column

Front 25

psoas minor origin/insertion

Back 25

(merges with iliacus inferiorly to form iliopsoas muscle)

Front 26

psoas minor innervation

Back 26

L1

Front 27

psoas minor action

Back 27

flexes the vertebral column

Front 28

iliacus origin

Back 28

superior 2/3 of iliac fossa, ala of sacrum, and anterior sacro-iliac ligaments

Front 29

iliacus insertion

Back 29

lesser trochanter of femur and shaft of inferior to it, and to psaos major tendon

Front 30

iliacus innervation

Back 30

femoral N

Front 31

iliacus action

Back 31

flexes the thigh

Front 32

quadratus lumborum origin

Back 32

medial half of inferior border of 12th ribs and tips of lumbar transverse processes

Front 33

quadratus lumborum insertion

Back 33

iliolumbar ligament and internal lip of iliac crest

Front 34

quadratus lumborum innervation

Back 34

T12-L4

Front 35

quadratus lumborum action

Back 35

stabilizes the 12th rib, extends the vertebral column, bends lumbar spine laterally