Anterolateral Abdominal Wall & Abdominopelvic Cavity & Posterior Abdominal Wall

Question 1

External Oblique Origin

Answer 1

External Surfaces of ribs 5-12

Question 2

External Oblique Insertion

Answer 2

Linea alba, Pubic tubercle, and anterior half of Iliac crest

Question 3

External Oblique Innervation

Answer 3

Thoracoabdominal nerves (T7-T11 spinal nerves ) and Subcostal nerve.

Question 4

External Oblique Action

Answer 4

Compresses and supports abdomial viscera, flexes and rotates trunk to opposite side

Question 5

Internal Oblique Origin

Answer 5

Thoracolumbar fascia, anterior 2/3rds of iliac crest, and connective tissue deep to the lateral third of the inguinal lig.

Question 6

Internal Oblique Insertion

Answer 6

Inferior borders of ribs 10-12, linea alba, and pecten pubis via conjoint tendon

Question 7

Internal Oblique Innervation

Answer 7

Thorac-abdominal nerves (anterior rami of T6-T12 spinal n.) and first Lumbar N. (iliohypogastric & ilioinguinal N)

Question 8

Internal Oblique Action

Answer 8

Compresses and supports abdomial viscera, flexes and rotates trunk to same side

Question 9

Transversus Abdominis Origin

Answer 9

Internal surface of the 7th-12th costal cartilages, thoracolumbar fascia, iliac crest, and connective tissue deep to the lateral 1/3rd of the inguinal lig.

Question 10

Transversus Abdominis Insertion

Answer 10

Linea Alba with aponeurosis of internal oblique, pubic crest, and pecten pubis via the conjoint tendon

Question 11

Transversus Abdominis Innervation

Answer 11

Thorac-abdominal nerves (anterior rami of T6-T12 spinal n.) and first Lumbar N.( iliohypogastric, ilioinguinal and genitofermal N)

Question 12

Transversus Abdominis Action

Answer 12

Compresses and supports abdominal viscera

Question 13

Rectus Abdominis Origin

Answer 13

Pubic symphysis and pubic crest

Question 14

Rectus Abdominis Insertion

Answer 14

Xiphoid process and the 5th -7th costal cartilages

Question 15

Rectus Abdominis Innervation

Answer 15

Thoraco-abdominal nerves (ant rami of T6-T12 spinal nerves)

Question 16

Rectus Abdominis Tendinous Intersections

Answer 16

3+

• level of xiphoid process
• level of umbilicus
• halfway b/w these structures

Question 17

Pyramidalis

Answer 17

• small, insignificant triangular muscle that is absent in about 20% of people.
• lies anterior to rectus abdominis
• attaches to the anterior surface of the pubis and the anterior pubic lig. and ends in the linea alba
• Tenses linea alba

Question 18

Psoas Major Origin

Answer 18

Transverse Processes of all Lumbar Vertebrae, Sides of bodies T12-L5, and discs between them

Question 19

Psoas Major Insertion

Answer 19

Lesser trochanter of Femur

Question 20

Psoas Major Innervation

Answer 20

Anterior rami of lumbar nerves (L1, L2, L3)

Question 21

Psoas Major Action

Answer 21

Acting Inferiorly w/ Iliacus, it flexes the thigh.
Acting superiorly it flexes the vertebral column laterally, balances the trunk , and when sitting acts inferiorly with Iliacus to flex the trunk

Question 22

Psoas Minor Origin

Answer 22

sides of T12 &L1 vertebral bodies and discs

Question 23

Psoas Minor Insertion

Answer 23

Pectineal line, iliopectineal eminence via iliopectineal arch

Question 24

Psoas Minor Innervation

Answer 24

Anterior Rami of lumbar nerves (L1,L2)

Question 25

Psoas Minor Action

Answer 25

Proprioception

Question 26

Iliacus Orgin

Answer 26

Superior 2/3rds of Iliac fossa, Ala of sacrum and anterior sacroiliac lig.

Question 27

Ilicus Insertion

Answer 27

Lesser Trochanter of the femur & shaft inferior to it, and Psoas Major tendon

Question 28

Ilicus Innervation

Answer 28

Femoral N. (L2-L4)

Question 29

Ilicus Action

Answer 29

Flexes thigh and stabilizes hip joint, acts with psoas major

Question 30

Quadratus Lumborum Orgin

Answer 30

Medial half of inferior border of the 12th rib and tips of the Lumbar Transvere processes

Question 31

Quadratus Lumborum Insertion

Answer 31

Iliolumbar lig. and internal lip of iliac crest

Question 32

Quadratus Lumborum Innervation

Answer 32

Anterior Branches of T12 and L1-L4 nerves

Question 33

Quadratus Lumborum Action

Answer 33

Extends and laterally flexes vertebral Column, fixes 12th rib during inspiration

Question 34

Diaphragm Origin

Answer 34

Posterior surface of xiphoid process, Inner surface of 7-12th ribs and costal cartilages, Ant. Surface of L1-L3 vertebrae, Medial and Lateral Arcuate ligaments

Question 35

Diaphragm Insertion

Answer 35

centeral tendon of the diaphagm

Question 36

Diaphragm Innervation

Answer 36

Motor/-: Right and Left Phrenic nerves (C3–C5),
Sensory: centrally by R./L. Phrenic nerves (C3–C5), peripherally by Intercostal nerves (T5–T11) and Subcostal nerves (T12)

Question 37

Diaphargm Action

Answer 37

Cheif mm of Respiration.Contracts to increase intrathoracic volume during inhalation and pushes abdominal viscera inferiorly

Question 38

Parts of diaphargm

Answer 38

Sternal Part, Costal Part, Lumbar Part

Question 39

Right Curs of diaphragm

Answer 39

Larger and longer, Wraps around the Esopgaus; Arises from anterior surfaces of the vertebral bodies L1-L3 or 4; the ALL, and the IV discs.

Question 40

Left Crus of diaphragm

Answer 40

Wraps around the Aorta; Arises from anterior surfaces of the vertebral bodies L1-L2 or 3 ; the ALL, and the IV discs.