Muscles Of The Thoracic Wall Flashcards

0
Q

External intercostal i.a.

A

Superior border of ribs below

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1
Q

External intercostal s.a.

A

Inferior border of ribs

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2
Q

External intercostal innervation

A

Intercostal nerve

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3
Q

External intercostal action

A

During forced inspiration

Elevates ribs

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4
Q

Internal intercostal s.a.

A

Inferior border of ribs

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5
Q

Internal intercostal I.a.

A

Superior border of ribs

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6
Q

Internal intercostal innervation

A

Intercostal nerve

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7
Q

Internal intercostal action

A

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

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8
Q

Innermost intercostal s.a.

A

Inferior border of ribs

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9
Q

Innermost intercostal I.a.

A

Superior border of ribs below

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10
Q

Innermost intercostal innervation

A

Intercostal nerve

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11
Q

Innermost intercostal action

A

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

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12
Q

Transversus thoracis s.a.

A

Posterior surface of lower sternum

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13
Q

Transversus thoracis I.a.

A

Internal surface of costal cartilages 2-6

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14
Q

Transversus thoracis innervation

A

Intercostal nerves

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15
Q

Transversus thoracis action

A

Weakly depresses ribs

16
Q

Subcostal s.a.

A

Internal surface of lower ribs near their angles

17
Q

Subcostal I.a.

A

Superior borders of 2nd or 3rd ribs below

18
Q

Subcostal innervation

A

Intercostal nerves

19
Q

Subcostal action

A

Probably act in same manner as internal intercostal muscles

20
Q

Levatores costarum s.a.

A

Transverse processes of t7-t11

21
Q

Levatores costarum I.a.

A

Subadjacent ribs between tubercle and angle

22
Q

Levatores costarum innervation

A

Posterior rami of c8-t11 nerves

23
Q

Levatores costarum action

A

Elevate ribs

24
Q

Serratus posterior superior s.a.

A

Nuchal ligament, spinous processes of c7-t3 vertebrae

25
Q

Serratus posterior superior I.a.

A

Superior borders of 2nd - 4th ribs

26
Q

Serratus posterior superior innrvation

A

2nd -5th intercostal nerves

27
Q

Serratus posterior superior action

A

Elevates ribs

28
Q

Serratus posterior inferior s.a

A

Spinous processes of t11-l2 vertebrae

29
Q

Serratus posterior inferior I.a.

A

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

30
Q

Serratus posterior inferior innervation

A

9th-11th intercostal nerves, subcostal t12 nerve

31
Q

Serratus posterior inferior action

A

Depresses ribs