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Anatomy Winter 2012 > Thorax I > Flashcards

Thorax I Flashcards

1
Q

Where can Trachea be traced form

A

C6- T4

Superio aspect- C6 (cricoid cartilage)
Inferior aspect- T4- Sternal angle of Louie

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2
Q

Where is apex o lung

A

1 inch above clavicle

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3
Q

Where is the cardiac notch of lung

A

behind 5tha nd 6th left costal cartilage

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4
Q

Where is the lower border of lung

A

Line from 6th rib (mid-clavicular) to 8th rib (mid-axillary) to 10th rib (posterior, adjacent to vertebral column)

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5
Q

Where is the oblique fissure

A

Divides each lung into superior and inferior lobes On both right and left sides

From T3 posteriorly to 5th intercostal space lateral/anteriorly (corresponds to medial border of teh scapula when teh shoulder is abducted completely)

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6
Q

Where is the horizontal fissure

A

Creates a middle lobe in the RIGHT lung.

Horizontal line across the 4th costal cartilage

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7
Q

What s the surface relationship of hte heart

A

Irregular quadrangle boudned by

2nd left costal cartilage 0.5 inch from sternum

3rd right costal cartilage 0.5 inches from sternum

5th left intercostal space 3.5 inches from midline

6th right costal cartilage 0.5 inch from sternum

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8
Q

What nerve supplies Pectoralis Major

A

Medial is More
Lateral is Less

Lateral and Medial pectoral Nerves

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9
Q

What nerve supplies the Pectoralis Minor

A

Lateral Pectoral Nerve

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10
Q

What is the framwork of the thorax formed by

A

Verterbral column Posteriorly

Ribs and Intercostal Spaces Laterally

Sternum and Costal Cartilages Anteriorly

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11
Q

What is teh MEdial cavity called

A

Mediastinum

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12
Q

What is the Lateral Cavity Called

A

Lungs and Pleurae

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13
Q

What are the borders of the Thoracic Inlet (Clincially Thoracic Outlet)

A

Anterior- Superior border of the manubrium
Lateral- medial border of rib 1
Posterior- 1st thoracic vertebra

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14
Q

What are the borders of the thoracic outet

A

Covered by diapharg

Anterior-xiphosernal joint
Lateral- curve of the costal margin
Posterior- 12th thoracic vertebra

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15
Q

Does the thoracic portioni concave forward or backward?

A

Forward

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16
Q

What is typical size and shape of the thoracic vertebra body

A

mediulm-sized

heart shaped

17
Q

What is the size and shape of verteabral foramen in thoracic vert

A

small and circular

18
Q

Where are there costal facets on thoracic vertebrae?

A

on lateral aspects of the body (for articulation with heads of ribs)

costal facets on transverse processes (for articulation with tubercles of ribs)

19
Q

What three muscles are in teh intercostal space that are needed for respiration

A

External intercostal
Internal intercostal
innermost intercostal

20
Q

What direction are External intercostal

A

fibers pass inferior and anterior (hands in pocket) from inferior border of a rib to superior border of the rib below

Extend from vertebra (posterior) to costo-chondral junction (anterior), where muscle is replacd by anterior (external) intercostal membrane

21
Q

where is muscle vs membrane for External Intercostal muscle

A

Muscle posterior

Membrane Anterior

22
Q

Where is muscle vs membrane for internal intercostal muscle

A

Anterior muscle

Posteror Membrane

23
Q

What direction is INternal intercostal

A

fibers pass inferior and posterior from sternum to angles of ribs, where they become poseterior (interal) intercostal membrane

24
Q

Between what two msucles are intercostal nerves and vessels?

A

Between intercostal muscles and innermost intercostal muscles (which travel in smae direcetion as intermost)

25
Q

Subcostal muscles

A

similar to innermost, but traverse 2-3 ribs

26
Q

Trasversus Thoracis

A

Crosses more than one intercostal space

Thin muscle arising from xiphoid process and inferior part of body of sternum

Insert on 2nd-6th costal cartilage

27
Q

Where is Levatores Costorum?

A

12 fan-shaped muscles arising from the transverse processes of C7 to T11 vertebrae, and insert inferiorly on ribs

28
Q

Where are the intercostal nerves located?

what kind of branches des it give off?

A

Theya re the anterior primary rami of the thoracic nerves

Each gives off a collateral muscular branch and lateral and anterior cutaneous branches to innervate thoracic and abdombinal walls

Anatomy Winter 2012 (12 decks)

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