DLA 47

Question 1

What are the inferior thoracic aperture boundaries?

Answer 1

12th thoracic vertebra
11th and 12th pair of ribs 
costal ridges of ribs 7-10 
Xiphisternal joint 
closed by the diaphragm

Question 2

Superior thoracic aperture boundaries?

structures passing through?

Answer 2

Body of the 1st thoracic vertebra
1st ribs and their costal cartilages
jugular notch

structures:
left subclavian artery
subclavian vein
brachiocephalic trunk

Question 3

Joints within the thoracic wall?

Answer 3

costovertebral - synovial joint between the rib and vertebra

sternocostal - synovial joint between the costal cartilage and the sternum

Question 4

External intercostal muscle

Answer 4

Fibers are down and medial
elevate and depress the ribs

segmental from intercostal nerve

Question 5

Internal intercostal muscle

Answer 5

fibers are down and lateral
elevate and depress the ribs

segmental from intercostal nerve

Question 6

innermost intercostal muscle

Answer 6

fibers are down and lateral
elevate and depress ribs

segmental from intercostal nerve

Question 7

deep muscles of the thoracic cage

Answer 7

transversus thoracis muscle

intercostal muscles

subcostal muscles

Question 8

What are the two recesses that allow for the movement of the lung during breathing?

Answer 8

1. costodiaphragmatic

2. costomediastinal