Thorax 1

Question 1

How many pairs of ribs?

Answer 1

12

Question 2

What is the purpose of the tubercle on a rib?

Answer 2

Raised proportion to attach to muscle or ligament

Question 3

What is the thoracic inlet?

Answer 3

superior thoracic aperture
ring formed of 1st thoratic vertebra )T1) and 1st ribs
Contents:
great vessels heading for neck and limb, ossophagus, trachea, nerves and lymphatics -> go through thoracic inlet

Question 4

What are the two ways of describing the movement of ribs?

Answer 4

Bucket handle

Pump handle

Question 5

How many layers of intercostal muscles?

Answer 5

3
External - orientated inferiomedially (like hands in pocket). Replaced by anterior intercostal membrane at costo-chondral (rib-cartilage) junction
Internal
Innermost

Question 6

How many pairs of intercostal nerves?

Answer 6

11
T1-11
+ 1 subcostal T12

Question 7

Where does the intercostal neurovascular bundle run?

What is is composed of and in which order?

Answer 7

In the intercostal groove, between innermost and internal intercostal muscles

Order
Vein
Artery
Nerve

Also collateral branches run just above the rib under

Question 8

What is the safe area for inserting a chest drain?

Answer 8

‘safe triangle’
ANterior border of the latissimus dorsi, the lateral border of the pectoralis major muscle, a line superior to the horizontal level of the nipple and an apex below the axilla. 5th intercostal space anterior to mid axillary line.

BASICALLY shadow made when lifting arm up.

Question 9

From where do the internal thoracic arteries come from?

Answer 9

Subclavian arteries