Muscles Of The Thoracic Wall

Question 0

Insertion of external intercostal

Answer 0

Superior border of ribs below

Question 1

Origin of external intercostal

Answer 1

Inferior border of ribs

Question 2

Innervation of external intercostal

Answer 2

Intercostal nerves

Question 3

Actions of external intercostal

Answer 3

During forced inspiration:

Elevate ribs

Question 4

Origin of internal intercostal

Answer 4

Inferior border of ribs

Question 5

Insertion of internal intercostal

Answer 5

Superior border of ribs below

Question 6

Innervation of internal intercostal

Answer 6

Intercostal nerves

Question 7

Actions of internal intercostal

Answer 7

During forced inspiration:
Interosseous part depresses ribs
Interchondral part elevates ribs

Question 8

Origin of innermost intercostal

Answer 8

Inferior border of ribs

Question 9

Insertion of innermost intercostal

Answer 9

Superior border of ribs below

Question 10

Innervation of innermost intercostal

Answer 10

Intercostal nerves

Question 11

Actions of innermost intercostal

Answer 11

During forced inspiration:
Interosseous part depresses ribs
Interchondral part elevates ribs

Question 12

Origin of transversus thoracis

Answer 12

Posterior surface of lower sternum

Question 13

Insertion of transversus thoracis

Answer 13

Internal surface of costal cartilages 2-6

Question 14

Innervation of transversus thoracis

Answer 14

Intercostal nerves (anterior rami of spinal nerves)

Question 16

Actions of transversus thoracis

Answer 16

Weakly depresses ribs

Question 17

Origin of subcostal

Answer 17

Internal surface of lower ribs near their angles

Question 18

Insertion of subcostal

Answer 18

Superior border of 2nd or 3rd ribs below

Question 19

Innervation of the subcostal

Answer 19

Intercostal nerve (anterior rami of spinal nerves)

Question 21

Actions of subcostal

Answer 21

Probably act in same manner as internal intercostal muscles

Question 22

Origin of levatores costarum

Answer 22

Transverse processes of T7-T11

Question 23

Insertion of levatores costarum

Answer 23

Subjacent ribs between tubercle and angle

Question 24

Innervation of levatores costarum

Answer 24

Posterior rami of C8-T11 nerves

Question 25

Action of levatores costarum

Answer 25

Elevate ribs

Question 26

Origin of serratus posterior superior

Answer 26

Nuchal ligament | Spinous processes of C7- T3 vertebrae

Question 27

Insertion of serratus posterior superior

Answer 27

Superior borders of 2nd-4th ribs

Question 28

Innervation of serratus posterior superior

Answer 28

2nd-5th intercostal nerves

Question 29

Action of serratus posterior superior

Answer 29

Elevates ribs

Question 30

Origin of serratus posterior inferior

Answer 30

Spinous processes of T11-L2 vertebrae

Question 31

Insertion of serratus posterior inferior

Answer 31

Inferior borders of 8th - 12th ribs near their angles

Question 32

Innervation of serratus posterior inferior

Answer 32

9th - 11th intercostal nerves, subcostal (T12) nerve

Question 33

Action of serratus posterior inferior

Answer 33

Depresses ribs