Thoracic and Abdominal Wall

Question 1

external oblique O

Answer 1

external surfaces of 5th-12th ribs

Question 2

external oblique I

Answer 2

Linea Alba
Pubic Tubercle
nat. half of iliac crest

Question 3

external oblique innervation

Answer 3

thoraco-abdominal nerves (ant. rami of T7-T11)

subcostal nerve

Question 4

external oblique actions

Answer 4

compress and support abdominal viscera

flex and rotate trunk

Question 5

internal oblique O

Answer 5

thoracolumbar fascia
anterior 2/3 of iliac crest
connective tissue deep to inguinal ligament

Question 6

internal oblique I

Answer 6

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

Question 7

internal oblique innervation

Answer 7

thoraco-abdominal nerves (ant. rami of T7-T11)
subcostal
first lumbar nerve

Question 8

internal oblique action

Answer 8

compress and support abdominal viscera

flex and rotate trunk

Question 9

transversus abdominis O

Answer 9

internal surfaces of 7th-12th costal cartilages
thoracolumbar fascia
iliac crest
cinnective tissue deep to inguinal ligament

Question 10

transversus abdominis I

Answer 10

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

Question 11

transversus abdominis innervation

Answer 11

thoraco-abdominal nerves (ant. rami of T7-T11)
subcostal nerve
first lumbar nerve

Question 12

transversus abdominis action

Answer 12

compresses and supports abdominal viscera

Question 13

rectus abdominis O

Answer 13

pubic symphysis

pubic crest

Question 14

Rectus abdominis I

Answer 14

xiphoid process

5th-7th costal cartilages

Question 15

rectus abdominis innervation

Answer 15

thoraco-abdominal and subcostal nerves (anterior rami of T7-T12 spinal nerves)

Question 16

rectus abdominis action

Answer 16

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

Question 17

external and internal intercostal O

Answer 17

inferior border of ribs

Question 18

external and internal intercostal I

Answer 18

superior border of ribs below

Question 19

external and internal intercostal innervation

Answer 19

intercostal nerve

Question 20

external intercostal action

Answer 20

during forced inspiration, elevates ribs

Question 21

internal intercostal action

Answer 21

during forced respiration, interosseous part depresses riibs, interchondral part elevates ribs

Question 22

transversus thoracics O

Answer 22

posterior surface of lower sternum

Question 23

transversus thoracics I

Answer 23

internal surface of costal cartilages 2-6

Question 24

transversus thoracics innervation

Answer 24

intercostal nerve

Question 25

transversus thoracics action

Answer 25

weakly depresses ribs

Question 26

Diaphragm action

Answer 26

Chief muscle of inspiration

Question 27

Diaphragm floor and roof

Answer 27

Forms the convex floor of the thoracic cavity

Forms the concave roof of the abdominal cavity