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Test 3 > Thoracic Wall Muscles > Flashcards

Thoracic Wall Muscles Flashcards

1
Q

Sternocleidomastoid Origin

A

lateral surface of mastoid process of temporal bone and lateral half of superior nuchal line

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2
Q

Sternocleidomastoid Insertion

A

Sternal head: anterior surface of manubrium of sternum
Clavicular head: superior surface of medial third of clavicle

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3
Q

Sternocleidomastoid Innervation

A

spinal accessory nerve (CN XI; motor), C2 and C3 nerves (pain and proprioception)

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4
Q

Sternocleidomastoid Action

A

Unilateral – laterally flexes neck and rotates if so face is turned superiorly toward opposite side
Bilateral – extend neck at atlantooccipital joint; flexes cervical vertebrae; extend superior cervical vertebrae while flexing inferior vertebrae; may elevate manubrium

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5
Q

Sternocleidomastoid Arterial Supply

A

Occipital, posterior auricular (ear), superior thyroid, and suprascapular arteries

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6
Q

Serratus Posterior Superior Origin

A

Nuchal ligament, spinous processes of C7 to T3 vertebrae

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7
Q

Serratus Posterior Superior Insertion

A

Superior borders of 2nd to 4th ribs

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8
Q

Serratus Posterior Superior Innervation

A

2nd to 5th intercostal nerves

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9
Q

Serratus Posterior Superior Action

A

Proprioception (elevate ribs)

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10
Q

Serratus Posterior Superior Arterial Supply

A

upper posterior intercostal arteries

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11
Q

Serratus Posterior Inferior Origin

A

Spinous processes of T11 to L2 vertebrae

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12
Q

Serratus Posterior Inferior Insertion

A

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

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13
Q

Serratus Posterior Inferior Innervation

A

Anterior rami to T9 to T12 thoracic spinal nerves

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14
Q

Serratus Posterior Inferior Action

A

Proprioception (depress ribs- forced expiration)

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15
Q

Serratus Posterior Inferior Arterial Supply

A

lower posterior intercostal arteries and subcostal artery

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16
Q

Levatores costarum Origin

A

Transverse processes of C7-T11

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17
Q

Levatores Costarum Insertion

A

Subjacent ribs between tubercle and angle

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18
Q

Levatores Costarum Innervation

A

Posterior primary rami of C8-T11 nerves

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19
Q

Levatores Costarum Action

A

Elevate ribs

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20
Q

Levatores Costarum Arterial Supply

A

posterior intercostal arteries

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21
Q

External Intercostal Origin

A

Inferior border of ribs

22
Q

External Intercostal Insertion

A

Superior border of ribs below

23
Q

External Intercostal Innervation

A

Intercostal nerve

24
Q

External Intercostal Action

A

Elevate ribs during forced inspiration

25
Q

External Intercostal Arterial Supply

A

posterior intercostal arteries , internal thoracic artery and musculophrenic artery

26
Q

Internal Intercostal Origin

A

Inferior border of ribs

27
Q

Internal Intercostal Insertion

A

Superior border of ribs below

28
Q

Internal Intercostal Innervation

A

Intercostal nerve

29
Q

Internal Intercostal Action

A

Interosseous part: depresses ribs during active (forced) respiration

30
Q

Internal Intercostal Arterial Supply

A

posterior intercostal arteries, internal thoracic artery and musculophrenic artery

31
Q

Innermost Intercostal Origin

A

Inferior border of ribs

32
Q

Innermost Intercostal Insertion

A

Superior border of ribs below

33
Q

Innermost Intercostal Innervation

A

Intercostal Nerve

34
Q

Innermost Intercostal Action

A

lnterchondral part: elevates ribs during active (forced) respiration

35
Q

Innermost Intercostal Arterial Supply

A

posterior intercostal arteries, internal thoracic artery and musculophrenic artery

36
Q

Subcostal Origin

A

Internal surface of lower ribs near their angles

37
Q

Subcostal Insertion

A

Superior borders of 2nd or 3rd ribs below

38
Q

Subcostal Innervation

A

Intercostal nerve

39
Q

Subcostal Action

A

Probably act in same manner as internal intercostal muscles (depresses ribs during active respiration

40
Q

Subcostal Arterial Supply

A

posterior intercostal arteries

41
Q

Transverse Thoracic Origin

A

Posterior surface of lower sternum

42
Q

Transverse Thoracic Insertion

A

Internal surface of costal cartilages 2-6

43
Q

Transverse Thoracic Innervation

A

Intercostal nerve

44
Q

Transverse Thoracic Action

A

Weakly depress ribs

45
Q

Transverse Thoracic Arterial Supply

A

internal thoracic artery

45
Q

Diaphragm Origin

A

L1- L3 vertebral bodies, inner surface of ribs 7- 12, xiphoid process

46
Q

Diaphragm Insertion

A

Central tendon

47
Q

Diaphragm Innervation

A

Phrenic nerve
C3, C4, C5

48
Q

Diaphragm Action

A

Upon contraction, the diaphragm descends & increases the height of the thoracic wall

49
Q

Diaphragm Arterial Supply

A

musculophrenic artery and subcostal arteries and intercostal artery

Test 3 (3 decks)

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