Thorax Flashcards

1
Q

Anterior median (midsternal) line

A

vertical line through sternum in mid-saggital plane

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2
Q

Midclavicular Lines (MCLs)

A

vertical through mid points of the clavicles, parallel to median line

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3
Q

Anterior Axillary line

A

vertical line along anterior axillary fold (pec major)

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4
Q

Mid Axillary line

A

vertical line through apex of axilla

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5
Q

Posterior axillary line

A

vertical line through posterior fold (formed by latissimus dorsi and teres major)

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6
Q

Posterior median (mid spinal or midvertebral) line

A

vertical line through spinous processes of vertebrae in mid-saggital plane

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7
Q

Scapular Lines

A

vertical lines that pass through inferior angles of scapula, line is parallel to posterior median line

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8
Q

Thoracic Wall

A

Bones: ribs, thoracic vertebrae, sternum

Function: protect thorax (heart, lungs, blood vessels, esophagus)

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9
Q

True Ribs

A

1-7

attach directly to sternum`

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10
Q

False Ribs

A

8-10

attach indirectly to sternum

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11
Q

Floating Ribs

A

11-12

do not attach to sternum

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12
Q

Typical & Atypical

A

Typical- 3-9 have 2 facets

atypical-1,2 10-12 (1-2 have areas for scalenes to attach, have 2 facets and articulate with 2 vertebral bodies)

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13
Q

Thoracic Vertebrae

A

costal facets on vertebral body and transverse process, ribs articulate with them

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14
Q

Sternum

A

made up of manubrium, body and xyphoid process

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15
Q

Manubrium

A

jugular notch

articulates with clavicle & 1st rib

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16
Q

Body of sternum

A

forms sternal angle w/manubrium

is where trachea bifurcates (carnia), beginning & end of aortic arch, palpation of sternal angle is location of 2nd rib

17
Q

Xiphoid Process

A

site of subcostal angle

18
Q

Joints of the Thorax

A
costovertebral joint
costochondrial joint
sternocostal
sternoclavicular joint
manubriosternal joint
xiphosternal
19
Q

Male Breast

A

nipple lies at approx. 4th intercostal (between ribs 4 and 5)

20
Q

Female Breast

A

ribs 2-6
glandular, approx 15-20 lobes drain into ducts
approx 75% of breast drains lateral into axillary lymph nodes

21
Q

Superior Aperture

A

CONTAINS:
esophagus
trachea
nerves & blood vessels that supply head, neck & ue

22
Q

Inferior Aperture

A

Allows, IVC, and aorta to pass inferiorly

23
Q

Transversus Thoracis

A

expiration, located along internal ribs, located on internal anterior thoracic cage

O-Posterior surface of lower sternum
I-internal surface of costal cartilage 2-6
N-Intercostal nerve
A-expiration

24
Q

Subcostal Muscles

A

inspiration, located on internal portion of ribs
located in interior posterior thoracic cage

O-internal surface of lower ribs near angles
I- superior boarders of 2nd or 3rd ribs
N- intercostal nerve
A-Inspiration

25
Q

Diaphragum

A

innervated by phrenic nerve
major muscle for inspiration
contraction flattens diaphragum, increases thoracic volume, change in pressure causes increase of air into the lungs

26
Q

Intercostal Space

A

3 layers- external, internal and innermost intercostal muscle

contains intercostal vein, artery and nerve

27
Q

Descending Aorta

A

provides blood to segmental branches known as posterior intercostals arteries

28
Q

Posterior Intercostals Arteries

A

come off descending aorta travel anteriorly between ribs (along intercostal vein and intercostal nerves)

29
Q

Subclavian Arteries

A

provide blood to R/L internal thoracic arteries

internal thoracic artery
anterior intercostals arteries

30
Q

Internal Thoracic Artery

A

descends along anterior wall of internal rib cage

31
Q

Anterior Intercostals Arteries

A

originates from descending internal thoracic artery

travels between ribs and anastomose with posterior intercostals arteries

32
Q

Azygos Vein

A

right posterior internal rib cage, drains into SVC

drains throax

33
Q

Hemiazygos & Accessory Hemiazygos Vein

A

left posterior internal rib cage

hemiazygos drains segmental portions of thorax

34
Q

Visceral Pleura

A

lines the lungs themselves

35
Q

Parietal Pleura

A

lines thoracic cavity wall and diaphragm

36
Q

Costodiaphragmatic Recesses

A

pleural recess that can accumulate fluid with various conditions, lateral and posterior

37
Q

Levator Costarum

A
Posterior, external thoracic rib cage
O- Transverse process of T7-T11
I- Subjacent ribs between tubericle & angle
N- posterior primary rami
A- Elevates ribs, inspiration
38
Q

Costomediastinal Recesses

A

small, pleural recess located posterior to sternum

where pneumothroax, pleural effusion, hemothroax and pleuritis would occur