Muscles Of The Thoracic Wall Flashcards Preview

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Flashcards in Muscles Of The Thoracic Wall Deck (32)
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External intercostal s.a.

Inferior border of ribs

1

External intercostal i.a.

Superior border of ribs below

2

External intercostal innervation

Intercostal nerve

3

External intercostal action

During forced inspiration
Elevates ribs

4

Internal intercostal s.a.

Inferior border of ribs

5

Internal intercostal I.a.

Superior border of ribs

6

Internal intercostal innervation

Intercostal nerve

7

Internal intercostal action

During forced inspiration : interosseous part depresses ribs; interchondral part elevates ribs

8

Innermost intercostal s.a.

Inferior border of ribs

9

Innermost intercostal I.a.

Superior border of ribs below

10

Innermost intercostal innervation

Intercostal nerve

11

Innermost intercostal action

During forced inspiration : interosseous part depresses ribs; interchondral part elevates ribs

12

Transversus thoracis s.a.

Posterior surface of lower sternum

13

Transversus thoracis I.a.

Internal surface of costal cartilages 2-6

14

Transversus thoracis innervation

Intercostal nerves

15

Transversus thoracis action

Weakly depresses ribs

16

Subcostal s.a.

Internal surface of lower ribs near their angles

17

Subcostal I.a.

Superior borders of 2nd or 3rd ribs below

18

Subcostal innervation

Intercostal nerves

19

Subcostal action

Probably act in same manner as internal intercostal muscles

20

Levatores costarum s.a.

Transverse processes of t7-t11

21

Levatores costarum I.a.

Subadjacent ribs between tubercle and angle

22

Levatores costarum innervation

Posterior rami of c8-t11 nerves

23

Levatores costarum action

Elevate ribs

24

Serratus posterior superior s.a.

Nuchal ligament, spinous processes of c7-t3 vertebrae

25

Serratus posterior superior I.a.

Superior borders of 2nd - 4th ribs

26

Serratus posterior superior innrvation

2nd -5th intercostal nerves

27

Serratus posterior superior action

Elevates ribs

28

Serratus posterior inferior s.a

Spinous processes of t11-l2 vertebrae

29

Serratus posterior inferior I.a.

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

30

Serratus posterior inferior innervation

9th-11th intercostal nerves, subcostal t12 nerve

31

Serratus posterior inferior action

Depresses ribs