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M1 Gross Anatomy > Breast/Thoracic Wall/Lungs > Flashcards

Breast/Thoracic Wall/Lungs Flashcards

1
Q

Pectoralis Major

Lateral innervation

A

C5-7 (lateral pectoral nerve)

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2
Q

Pectoralis Major

Medial innervation

A

C8 and T1 (medial pectoral nerve)

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3
Q

Pectoralis Major

Origin

A

Clavicular and sternocostal heads

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4
Q

Pectoralis Major

Insertion

A

The crest of the greater tubercle (humerous)

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5
Q

Pectoralis Major

Movement

A

Upper arm:

Flexion (upper fibers better)

Adduct

Internal rotaion (horizontal flexion)

Can also extend with flexed elbow (lower fibers)

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6
Q

Pectoralis Major

Blood supply

A

Internal thoracic
lateral thoracic
intercostal
Pectoral branches of thoracoacromial trunk

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7
Q

Pectoralis minor

Origin

A

Ribs 3-5

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8
Q

Pectoralis minor

Insertion

A

Medial border of the coracoid process

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9
Q

Pectoralis minor

Innervation

A

Medial (C8 and T1)
Pectoral nerve

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10
Q

Pectoralis minor

Movement

A

Stabilizes scapula
Elevates rib cage

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11
Q

Where does the interal thoracic artery originate and what are its branches?

A

The subclavian arteries give rise to the internal thoracic arteries.

The internal thoracic arteries give rise to the anterior intercostal arteries before dividing into the epigastric and musculophrenic arteries inferiorly

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12
Q

What does the musculophrenic artery arise from and what does it divide into?

A

Arises from the interal thoracic artery and gives rise to anterior intercostal arteries 6-9

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13
Q

What artery supplies the rectus abdominus?

A

The epigastric artery (from internal thoracic)

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14
Q

Where is the neurovascular bunds of the ribs located?

A

The NV bundles runs along the inferior edges of the upper ribs

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15
Q

Serratus anterior

Origin and insertion

A

Origin - upper borders of ribs 1-8

Insertion - medial scapula

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16
Q

Serratus anterior

Innervation

A

Long thoracic nerve (C5-7)

Damage to this nerve creates winging of the scapula

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17
Q

What is the functional tissue of the breast?

A

Glandular lobules

Drain into lactiferous ducts

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18
Q

What gives rise to the dimpling (orange peel appearance of breast)

A

Glandular tumor of the breast pulling/pushing on the Cooper’s (suspensory) ligaments

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19
Q

Breast

Blood supply

A

Medial mammory - internal thoracic

Thoracoacromial trunck -pectoral branches supply upper middle

Later - lateral thoracic (mainly supply serratus anterior)

also intercostals

20
Q

Breast

Lymph node levels

A
21
Q
A

Phrenic nerve (C3,4, and 5)

Somatic motor nerve to skeletal muscle

22
Q

Where does the diaphragm receive its sensory nerve supply?

A

Diaphragmatic and medistinal pleura, and pericardial sac

23
Q

Where does the inferior vena cava cross the diagphragm?

A

TV 8 through the central tendon

24
Q

Where does the esophagus cross the diaphragm?

A

TV 10 through the esophageal hiatus

Vagal trunks tavel through diaphragm with esophagus

25
Q

Where does the descending aorta cross the diaphragm?

A

TV 12 through the aortic hiatus

Thoracic duct also travels with aorta

26
Q

Pain from the organs

A

sympathetic

27
Q

Where is the horizontal fissue?

Right lung

A

Midclavicular line at rib 4

28
Q

Where is the oblique fissue of the right lung?

A

The midclavicular line at rib 6

29
Q

Where does fluid collect in the thorax?

A

The costodiaphragmatic recess

30
Q

What anatomical feature marks the bottom of the lungs?

A

Rib 6 - Anteriorly
Rib 8 - Laterally
Rib 10 - Posteriorly

Always a two rib difference between parietal lining and base of lung (pleura is found two ribs lower)

31
Q

What is the parietal pleura innervated by?

A

Intercostal nerves

32
Q

What is the mediastinal and diaphragmatic pleura innervated by?

A

The phrenic nerve

33
Q

VATE as it applies to right lung

A
34
Q

Structure of the left lung

A
35
Q

Where does the thoracic duct terminate?

A

The left venous angle

36
Q

Subclavius muscle

Origin and insertion

A

Origin - rib 1 near costal cartilage

Insertion - Clavicle (deep)

37
Q

Subclavius muscle

Innervation

A

Nerve to subclavius (C5 and 6)

38
Q

Subclavius muscle

Movement

A

Depress shoulder and lateral clavicle

39
Q

What is the only intercostal muscle that elevates ribs for expiration?

A

The external intercostal

40
Q

Where doe the posterior intercostal arterites arise?

A

The descending aorta (form anastomoses with anterior intercostal arteries)

41
Q

SALT

A

Serratus
Anterior
Long Thoracic (nerve)

or
Lateral Thoracic (artery)

42
Q

What gives rise to the lateral thoracic artery?

A

The axillary artery

43
Q

True ribs

A

Ribs 1-7 (attach to the sternum)

44
Q

False ribs

A

Ribs 8-10 (attach to the costal cartilage above)

45
Q

Floating ribs

A

Ribs 11 and 12

46
Q

What lymph nodes associate with the axillary tail of Spence?

A

Level I lymph nodes along the pectoral vein and pectoralis major draining the anterior thoracic wall and most of breast.

47
Q

What vein do level I lymph nodes associate with?

A

The axillary vein (drains deep structures of the upper limbs)

M1 Gross Anatomy (16 decks)

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