Thoracic Anatomy Flashcards Preview

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Flashcards in Thoracic Anatomy Deck (54)
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1

What is the thoracic cage made of?

12 thoracic vertebrae
Sternum
Twelve pairs of ribs

2

What are the anatomical parts of the sternum?

Manubrium, body, xiphoid

3

What does the manubrium articulate with?

1st ribs, part of the 2nd rib, and body of sternum

4

What type of joint is the body-manubrium joint of the sternum?

Symphoseal

5

What does the body articulate with?

Ribs 2 to 6 via synovial joints

6

What type of joint joins the body and xiphoid of the sternum?

Symphoseal

7

What may ribs be classified as?

Vertebrosternal (true)
Vertebrochondral (false)
Vertebral (floating)

8

Which ribs are vertebrosternal?

1-7

9

What ribs are vertebrochondral ribs?

8-10

10

What ribs are vertebral?

11-12

11

Which ribs are considered typical?

3-9

12

What features are on the head of a typical rib?

An upper and lower demi-facets

13

What features are on the neck of a typical rib?

Crest for the superior costotransverse ligament

14

What features are on the tubercle of a typical rib?

Facet for the transverse process and a rough part for the lateral costotransverse ligament

15

What is between the tubercle and shaft of a typical rib?

The angle

16

What characteristics does the upper border of the shaft of a typical rib have?

It is smooth and rounded

17

What characteristics does the lower border of the shaft of a typical rib have?

Sharp and shelters the costal groove

18

Which ribs are atypical?

1st, 2nd, 10th, 11th, 12th

19

What is unique about rib 1?

Shortest
Only 1 articular facet
Additional tubercle for anterior scalene
Has no costal grove, but a groove for the subclavian artery

20

What is unique about rib 2?

Has a large rough tuberosity for the attachment of serratus anterior

21

What is unique about ribs 10-12?

They only posess one facet head

22

What is the muscle fiber orientation of the intercostal muscles?

External - downwards and medially
Internal - upwards and medially
Innermost - upwards and medially

23

Where does the neurovascular bundle lie in the intercostal space?

Internal and innermost intercostal muscles

24

Where does the intercostal vein drain?

Azygos venous system

25

Where does the intercostal artery receive blood from?

Internal thoracic artery and the thoracic aorta

26

What is the intercostal nerve a branch of?

The ventral ramus of a thoracic spinal nerve

27

What covers the intercostal space externally and internally?

Skin, Parietal pleura

28

What structure is the breast a modified version of?

Apocrine sweat gland

29

Where is the breast located?

In superficial fascia mostly, the tail is under the deep fascia of the axilla

30

What ribs does the breast sit between?

2nd and 6th