Lab 6

Question 1

Origin of External Intercostals

Answer 1

Inferior Margin of 1st 11 ribs

Question 2

Insertion of External Intercostals

Answer 2

Superior margin of rib below

Question 3

Action of External Intercostals

Answer 3

Elevates ribs during inspiration

Question 4

Nerve Supply of External Intercostals

Answer 4

Intercostal Nerves

Question 5

Blood Supply to External Intercostals

Answer 5

Ribs 1-2= supreme intercostal and thoracic arteries

Ribs 3-12= anterior intercostal, posterior intercostal and subcostal arteries.

Question 6

Origin of Internal Intercostals

Answer 6

Inferior margin of 1st 11 ribs from cartilages to angles

Question 7

Insertion of Internal intercostals

Answer 7

superior margin of ribs below

Question 8

Action of internal intercostals

Answer 8

elevates ribs during inspiration

Question 9

Nerve supply of internal intercostals

Answer 9

intercostal nerves

Question 10

blood supply of internal intercostals

Answer 10

ribs 1-2=supreme intercostal and superior thoracic arteries

ribs 3-12= anterior intercostal, posterior intercostal, and subcostal arteries

Question 11

origin of subcostals

Answer 11

posteriorly on internal surface of lower 6 ribs

Question 12

insertion of subcostals

Answer 12

internal surface of 2nd and 3rd rib above

Question 13

action of subcostals

Answer 13

depresses lower ribs

Question 14

nerve supply of subcostals

Answer 14

intercostal nerves

Question 15

blood supply of subcostals

Answer 15

posterior intercostal arteries

Question 16

origin of transversus thoracis

Answer 16

internal surface of sternum and adjacent costal cartilages of ribs 3-6

Question 17

insertion of transversus thoracis

Answer 17

internal surface of costal cartilage of ribs 2-6

Question 18

action of transversus thoracis

Answer 18

depresses upper ribs

Question 19

nerve supply of transversus thoracis

Answer 19

intercostal nerves

Question 20

blood supply of transversus thoracis

Answer 20

anterior intercostal arteries

Question 21

Origin of diaphragm

Answer 21

xiphoid process of sternum
lower 6 costal cartilages
first 3 lumbar vertebrae
medial and lateral arcuate ligaments

Question 22

insertion of diaphragm

Answer 22

central tendon of the diaphragm

Question 23

action of diaphragm

Answer 23

depresses central tendon to increase vertical dimension of thorax during inspiration

Question 24

nerve supply of diaphragm

Answer 24

phrenic nerve

Question 25

blood supply of diaphragm

Answer 25

superior phrenic artery | inferior phrenic artery

Question 26

origin of rectus abdominus

Answer 26

public symphysis and crest

Question 27

insertion of rectus abdominus

Answer 27

costal cartilages of ribs 5,6,7 | xiphoid process

Question 28

action of rectus abdominus

Answer 28

flexes vertebral column | compresses abdomen

Question 29

nerve supply of rectus abdominus

Answer 29

intercostal nerves T7-T12

Question 30

blood supply of rectus abdominus

Answer 30

superior and inferior epigastric arteries

Question 31

origin of external abdominal oblique

Answer 31

lower 8 ribs

Question 32

insertion of external abdominal oblique

Answer 32

abdominal aponeurosis to linea alba pubis anterior iliac crest

Question 33

action of external abdominal oblique

Answer 33

bilateral- flexes vertebral column and compresses abdomen | unilateral- lateral flexion and contralateral rotation of vertebral column

Question 34

nerve supply external abdominal oblique

Answer 34

intercostal nerves T7-T12 | iliohypogastric and ilioinguinal nerves

Question 35

blood supply of external abdominal oblique

Answer 35

lower posterior intercostal, subcostal, and deep circumflex iliac arteries

Question 36

origin of internal abdominal oblique

Answer 36

inguinal ligament iliac crest thoracolumbar aponeurosis

Question 37

insertion of internal abdominal oblique

Answer 37

costal cartilages of lower 4 ribs | abdominal aponeurosis to linea alba

Question 38

action of internal abdominal oblique

Answer 38

bilateral-flexes vertebral column and compresses abdomen | unilateral-lateral flexion and ipsilateral rotation of vertebral column

Question 39

nerve supply of internal abdominal oblique

Answer 39

intercostal nerves T8-T12 | iliohypogastric and ilioinguinal nerves

Question 40

blood supply of internal abdominal oblique

Answer 40

lower posterior intercostal, subcostal and deep circumflex iliac arteries

Question 41

origin of transverus abdominus

Answer 41

inguinal ligament iliac crest thoracolumbar aponeurosis costal cartilages of ribs 7-12

Question 42

insertion of transversus abdominus

Answer 42

abdominal aponeurosis to linea alba | pubis

Question 43

action of transversus abdominus

Answer 43

compresses abdomen

Question 44

nerve supply of transverus abdominus

Answer 44

intercostal nerves T7-T12 | iliohypogastric and ilionguinal nerves

Question 45

blood supply of transversus abdominus

Answer 45

lower posterior intercostal, subcostal, and deep circumflex arteries

Question 46

origin of quadratus lumborum

Answer 46

iliac crest

Question 47

insertion of quadratus lumborum

Answer 47

12th rib | transverse processes L1-4

Question 48

action of quadratus lumborum

Answer 48

normal: lateral flexion of vertebral column | reverse- elevates hips

Question 49

nerves supply of quadratus lumborum

Answer 49

ventral rami T12-L4

Question 50

blood supply of quadratus lumborum

Answer 50

subcostal and lumbar arteries

Question 51

origin of iliacus

Answer 51

iliac fossa

Question 52

insertion of iliacus

Answer 52

lesser trochanter of femur

Question 53

action of iliacus

Answer 53

normal: flexion of hip reverse: flexion of lumbar vertebral column

Question 54

nerve supply of iliacus

Answer 54

femoral nerve

Question 55

blood supply of iliacus

Answer 55

subcostal and lumbar arteries

Question 56

psoas major origin

Answer 56

T12-L5 vertebral bodies and disks | L1-L5 transverse processes

Question 57

insertion of psoas major

Answer 57

lesser trochanter of femur

Question 58

action of psoas major

Answer 58

normal- flexion of hip | reverse- flexion of lumbar vertebral column

Question 59

nerve supply of psoas major

Answer 59

L2,L3

Question 60

Blood supply of psoas major

Answer 60

subcostal and lumbar arteries

Question 61

origin of psoas minor

Answer 61

T12

Question 62

insertion of psoas minor

Answer 62

superior ramus of pubis

Question 63

action of psoas minor

Answer 63

flexion of lumbar vertebral column

Question 64

nerve supply of psoas minor

Answer 64

L1

Question 65

blood supply of psoas minor

Answer 65

subcostal and lumbar arteries