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Anatomy Of The Thorax, Abdomin, & Pelvis > Muscles Of The Thoracic Wall > Flashcards

Muscles Of The 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 ribs

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2
Q

Innervation of external intercostal

A

Intercostal nerves

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3
Q

Actions of external intercostal

A

During forced inspiration:

Elevate ribs

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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 nerves

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7
Q

Actions of internal intercostal

A

During forced inspiration:
Interosseous 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 nerves

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11
Q

Actions of innermost intercostal

A

During forced inspiration:
Interosseous 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 nerves (anterior rami of spinal nerves)

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16
Q

Actions of transversus thoracis

A

Weakly depresses ribs

17
Q

Origin of subcostal

A

Internal surface of lower ribs near their angles

18
Q

Insertion of subcostal

A

Superior border of 2nd or 3rd ribs below

19
Q

Innervation of the subcostal

A

Intercostal nerve (anterior rami of spinal nerves)

21
Q

Actions of subcostal

A

Probably act in same manner as internal intercostal muscles

22
Q

Origin of levatores costarum

A

Transverse processes of T7-T11

23
Q

Insertion of levatores costarum

A

Subjacent ribs between tubercle and angle

24
Q

Innervation of levatores costarum

A

Posterior rami of C8-T11 nerves

25
Q

Action of levatores costarum

A

Elevate ribs

26
Q

Origin of serratus posterior superior

A

Nuchal ligament

Spinous processes of C7- T3 vertebrae

27
Q

Insertion of serratus posterior superior

A

Superior borders of 2nd-4th ribs

28
Q

Innervation of serratus posterior superior

A

2nd-5th intercostal nerves

29
Q

Action of serratus posterior superior

A

Elevates ribs

30
Q

Origin of serratus posterior inferior

A

Spinous processes of T11-L2 vertebrae

31
Q

Insertion of serratus posterior inferior

A

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

32
Q

Innervation of serratus posterior inferior

A

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

33
Q

Action of serratus posterior inferior

A

Depresses ribs

Anatomy Of The Thorax, Abdomin, & Pelvis (3 decks)

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