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Anatomy Lab > Thorax Muscles > Flashcards

Thorax Muscles Flashcards

1
Q

Diaphragm origin

A

Xiphoid process, lower 6 costal cartilages, L1-L3 vertebrae

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2
Q

Diaphragm insertion

A

Converges into central tendon

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3
Q

Diaphragm action

A

Draws central tendon down and forward during inspiration

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4
Q

Diaphragm innervation

A

Phrenic nerve

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5
Q

Diaphragm blood supply

A

Pericardiacophrenic, musculophrenic, superior and inferior phrenic arteries

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6
Q

Internal intercostals origin

A

Lower border of rib (11 pairs)

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7
Q

Internal intercostal insertion

A

Upper border of rib below orgin

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8
Q

Internal intercostal action

A

Forced expiration with exertion

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9
Q

Internal intercostal innervation

A

Intercostal nerves

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10
Q

Internal intercostal blood supply

A

Posterior and anterior intercostal arteries

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11
Q

External intercostal origin

A

Lower border of rib (11 pairs)

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12
Q

External intercostal insertion

A

Upper border of rib below origin

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13
Q

External intercostal action

A

Inspiration with exertion and quiet breathing

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14
Q

External intercostal innervation

A

Intercostal nerves

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15
Q

External intercostal blood supply

A

Posterior and anterior intercostal arteries

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16
Q

Serratus posterior superior origin

A

Ligamentum nuchae, spinous process of C7-T3

17
Q

Serratus posterior superior insertion

A

Superior aspect of ribs 2-4

18
Q

Serratus posterior superior action

A

Elevation of ribs

19
Q

Serratus posterior superior innervation

A

Ventral rami of upper thoracic nerves

20
Q

Serratus posterior superior blood supply

A

Posterior intercostal arteries

21
Q

Serratus posterior inferior origin

A

Spinous process of T11-L2

22
Q

Serratus posterior inferior insertion

A

Inferior aspect of ribs 9-12

23
Q

Serratus posterior inferior action

A

Depresses ribs

24
Q

Serratus posterior inferior innervation

A

Ventral rami of lower thoracic nerves

25
Q

Serratus posterior inferior blood supply

A

Posterior intercostal arteries

26
Q

Levatores costarum origin

A

Transverse processes C7-T11

27
Q

Levatores costarum insertion

A

Corresponding rib at superior border, between costal angle and tubercle

28
Q

Levatores costarum action

A

Assists with deep inspiration

29
Q

Levatores costarum innervation

A

Dorsal rami

30
Q

Levatores costarum blood supply

A

Posterior intercostal arteries

31
Q

Pectoralis minor origin

A

Ribs 3-5

32
Q

Pectoralis minor insertion

A

Corocoid process of scapula

33
Q

Pectoralis minor action

A

Depression of shoulder, downward rotation of scapula

34
Q

Pectoralis minor innervation

A

Medial Pectoral nerve

35
Q

Pectoralis minor blood supply

A

Pectoral branch of thoraco-acromial and intercostal lateral thoracic arteries

Anatomy Lab (13 decks)

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