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Flashcards in Anterior mediastinum Deck (20):
1

what is the mediastinum?

the central compartment of the thoracic cavity

2

where is the mediastinum located?

between the two pleural sacs

3

what does the mediastinum contain?

most of the thoracic organs

4

what does the mediastinum act as?

a conduit for structures traversing the thorax on their way into the abdomen

5

how is the mediastinum divided anatomically?

the mediastinum is divided into two parts by an imaginary line that runs from the sternal angle to the T4 vertebrae

6

what is the sternal angle?

the angle formed by the junction of the sternal body and manubrium

7

where does the superior mediastinum extend and where does it terminate?

extends upwards, terminating at the superior thoracic aperture

8

where does the inferior mediastinum extend and where does it terminate?

extends downwards, terminating at the diaphragm

9

what is the inferior mediastinum further subdivided into?

the anterior mediastinum, middle mediastinum and posterior mediastinum

10

what is the lateral border of the anterior mediastinum?

Mediastinal pleura

11

what is the mediastinal pleura?

part of the parietal pleural membrane

12

what is the anterior border of the anterior mediastinum?

Body of the sternum and the transversus thoracis muscles

13

what is the posterior border of the anterior mediastinum?

Pericardium

14

what is the roof of the anterior mediastinum?

Continuous with the superior mediastinum at the level of the sternal angle

15

what is the floor of the anterior mediastinum?

Diaphragm

16

what does the anterior mediastinum contain?

no major structures. It accommodates loose connective tissue, fat, some lymphatic vessels, lymph nodes and branches of the internal thoracic vessels

17

what kind of loose CT is included in the anterior mediastinum?

the sternopericardial ligaments, which tether the pericardium to the sternum

18

what does the sternopericardial ligament tether?

pericardium to the sternum

19

where does the thymus extend in infants and children?

the thymus extends inferiorly into the anterior mediastinum

20

what happens to the thymus in puberty?

the thymus recedes during puberty and is no longer present in adulthood