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
