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MSK > Anterior Chest Wall > Flashcards

Anterior Chest Wall Flashcards

1
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A
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3
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1a - Mammary lobules

2 - Lactiferous ducts

3 - Lactiferous sinuses

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4
Q
A

1 - Mammary lobes

2 - Lactiferous ducts

3 - Lactiferous sinuses

4 - Suspensory ligaments

5 - Pectoralis Major

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5
Q

Breast tissue is vascularized from what 2 sources?

A

Medially: internal thoracic artery

Laterally: lateral thoracic artery

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6
Q

How is the skin above the breast innervated?

A

Intercostal nerves

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7
Q

Different portions of breast tissue drain to […] lymph nodes, mostly located in the […]

A

different

Axilla (armpit)

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11
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12
Q

What are true ribs?

A

Ribs 1-7 - they are attached to the sternum via cartilage that connects directly

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13
Q

What are false ribs?

A

Ribs 8 - 10. They attach to cartilage that all attaches to the cartilage of rib 7, which then attaches to the sternum. As such, they have no individual and direct attachments to the sternum.

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14
Q

What are ribs 11 and 12?

A

Floating ribs - they have no attachment to the sternum at all.

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15
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16
Q
  • What muscle is this?
  • What 3 parts is it subdivided into?
  • How is it innervated?
  • What is its action?
A
  • Pectoralis major
  • Clavicular; Sternocostal; Abdominal
  • By the medial and lateral pectoralis nerves
  • Internal rotation and adduction of the humerus
17
Q
  • What muscle is shown here (inferior muscle)?
  • What is its action?
  • How is it innervated?
A
  • Pectoralis minor
  • Inferior rotation of the glenoid
  • Medial pectoral nerves
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21
Q

Breast tissue overlays ribs # - #

A

2 - 6

22
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23
Q

The nipple corresponds with rib # except in females with pendulous breasts

A

4

24
Q

The […] is a common location for malignancy in breast tissue.

A

Axillary tail

25
Q

Mammary glands are modified […] glands and they fully develop only if the mother carries the fetus thorugh until at least the […]

A

Sweat

2nd trimester

MSK (38 decks)

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