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Exam 3 > Muscles of Thoracic Wall > Flashcards

Muscles of Thoracic Wall Flashcards

0
Q

Insertion of external intercostal

A

Superior border of ribs below

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1
Q

Origin of external intercostal

A

Inferior border of the ribs

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2
Q

Innervation of external intercostal

A

Intercostal nerve

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3
Q

Action of external intercostal

A

During forced inspiration: elevates rib

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4
Q

Origin of internal intercostal

A

Inferior border of ribs

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5
Q

Insertion of internal intercostal

A

Superior border of ribs below

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6
Q

Innervation of internal intercostal

A

Intercostal nerve

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7
Q

Action of internal intercostal

A

During forced respiration: interosseus part depresses ribs; interchondral part elevates ribs

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8
Q

Origin of innermost intercostal

A

Inferior border of ribs

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9
Q

Insertion of innermost intercostal

A

Superior border of ribs below

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10
Q

Innervation of innermost intercostal

A

Intercostal nerve

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11
Q

Action of innermost intercostal

A

During forced respiration: interosseus part depresses ribs; interchondral part elevates ribs

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12
Q

Origin of transversus thoracis

A

Posterior surface of lower sternum

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13
Q

Insertion of transversus thoracis

A

Internal surface of costal cartilages 2-6

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14
Q

Innervation of transversus thoracis

A

Intercostal nerve

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15
Q

Action of transversus thoracis

A

Weakly depresses ribs

16
Q

Origin of subcostal

A

Internal surface of lower ribs near their angles

17
Q

Insertion of subcostal

A

Superior borders of 2nd or 3rd ribs below

18
Q

Innervation of subcostal

A

Intercostal nerve

19
Q

Action of subcostal

A

Probably act in same manner as internal intercostal muscles

20
Q

Origin of levatores costarum

A

Transverse processes of T7-T11

21
Q

Insertion of levatores costarum

A

Subjacent ribs between tubercle and angle

22
Q

Innervation of levatores costarum

A

Posterior rami of C8-T11 nerves

23
Q

Action of levatores costarum

A

Elevate ribs

24
Q

Origin of serratus posterior superior

A

Nuchal ligament, spinous processes of C7-T3 vertebrae

25
Q

Insertion of serratus posterior superior

A

Superior borders of 2nd-4th ribs

26
Q

Innervation of serratus posterior superior

A

2nd-5th intercostal nerves

27
Q

Action of serratus posterior superior

A

Elevate ribs

28
Q

Origin of serratus posterior inferior

A

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

29
Q

Insertion of serratus posterior inferior

A

Spinous processes of T11-L2 vertebrae

30
Q

Innervation of serratus posterior inferior

A

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

31
Q

Action of serratus posterior inferior

A

Depress ribs

Exam 3 (2 decks)

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