Muscles

Question 1

External intercostal

Location

Answer 1

within intercostal spaces from tubercles of ribs to costochondral joints

Question 2

External intercostal

attachments

Answer 2

inferior border of the rib above and superior border of the rib below

Question 3

External intercostal

action

Answer 3

aid in inspiration (elevate the ribs, increase thoracic volume)

Question 4

Internal intercostal

location

Answer 4

within intercostal spaces from angles of ribs to sternum

Question 5

Internal intercostal

attachments

Answer 5

inferior border of the rib above and superior border of rib below

Question 6

Internal intercostal

action

Answer 6

interosseus: aid in expiration (depress ribs, decrease thoracic volume)
interchondral: aid in inspiration (elevate ribs, increase thoracic volume)

Question 7

Internal intercostal

innervation

Answer 7

Intercostal nerves (T1-T11)

Question 8

External intercostal

innervation

Answer 8

Intercostal nerves (T1-T11)

Question 9

Innermost intercostal

location

Answer 9

within lateral intercostal spaces

Question 10

Innermost intercostal

attachments

Answer 10

inferior border of rib above and superior border of rib below

Question 11

Innermost intercostal

action

Answer 11

aid in expiration (depress ribs; decrease thoracic volume)

Question 12

Innermost intercostal

innervation

Answer 12

intercostal nerves (T1-T11)

Question 13

Transversus thoracis

location

Answer 13

internal surface of anterior thoracic wall

Question 14

Transversus thoracis

attachments

Answer 14

posterior surface of sternum and posterior surface of costal cartilages

Question 15

Transversus thoracis

action

Answer 15

depress ribs (aid in expiration)

Question 16

Transversus thoracis

innervation

Answer 16

intercostal nerves (T1-T11)

Question 17

Subcostal

location

Answer 17

internal surface of posterior thoracic wall

Question 18

Subcostal

attachments

Answer 18

inferior border of the ribs near angles and superior border of 2nd or 3rd rib inferior

Question 19

Subcostal

action

Answer 19

depress ribs (expiration)

Question 20

Subcostal

innervation

Answer 20

Intercostal nerves (T1-T11)

Question 21

Diaphragm

location

Answer 21

divides thoracic and abdominopelvic cavities

Question 22

Diaphragm

attachments

Answer 22

central tendon; posterior surface of xiphoid process; inferior ribs and their costal cartilages; anterior surface of vertebral bodies L1-L3

Question 23

Diaphragm

innervation

Answer 23

Phrenic nerves (C3-C5)

Question 24

Diaphragm

action

Answer 24

contraction during inspiration, forced contraction during defecation, urination, and childbirth

Question 25

External oblique | attachments

Answer 25

lower ribs, linea alba, pubic crest, iliac crest

Question 26

External oblique | action

Answer 26

compress abdomen; flex and rotate trunk

Question 27

External oblique | innervation

Answer 27

lower intercostal nerves (T6-T11) and subcostal nerve (T12)

Question 28

Internal oblique | attachment

Answer 28

thoracolumbar fascia, iliac crest, inguinal ligament, pubic bone, lower ribs, linea alba

Question 29

Internal oblique | action

Answer 29

compress abdomen; flex and rotate trunk

Question 30

Internal oblique | innervation

Answer 30

Lower intercostal nerves (T6-T11) subcostal nerve (T12), anterior rami of L1

Question 31

Transverse abdominis | attachment

Answer 31

lower costal cartilages, thoracolumbar fascia, iliac crest, inguinal ligament, linea alba, public bone

Question 32

Transverse abdominis | action

Answer 32

compress abdomen

Question 33

Transverse abdominis | innervation

Answer 33

Lower intercostal nerves (T6-T11) subcostal nerve (T12), anterior rami of L1

Question 34

Rectus abdominis | attachment

Answer 34

pubic symphysis, pubic bone, xiphoid process, lower costal cartilages

Question 35

Rectus abdominis | action

Answer 35

compress abdomen, flex turnk

Question 36

Rectus abdominis | innervation

Answer 36

Lower intercostal nerves (T6-T11) and subcostal nerve (T12)

Question 37

Psoas major | attachments

Answer 37

Transverse processes and bodies of lumbar vertebrae, lumbar intervertebral discs, and lesser trochanter of femur

Question 38

Psoas major | action

Answer 38

flex thigh, laterally flex vertebral column, flex vertebral column

Question 39

Psoas major | innervation

Answer 39

Anterior rami of L1-L3

Question 40

Iliacus | attachments

Answer 40

iliac fossa, ala of sacrum, lesser trochanter of femur

Question 41

Iliacus | action

Answer 41

flexes thigh

Question 42

Iliacus | innervation

Answer 42

Femoral nerve (L2-L4)

Question 43

Quadratus lumborum | attachments

Answer 43

transverse processes of lumbar vertebrae, inferior border of rib 12, iliac crest

Question 44

Quadratus lumborum | action

Answer 44

extend vertebral column, laterally flex vertebral column, stabilizes 12th rib during inspiration

Question 45

Quadratus lumborum | innervation

Answer 45

Anterior rami of T12-L4