2 Structure IDs- Thoracic Cage (Muscles, Bony Landmarks, Joints)

Question 1

External intercostal

Answer 1

Attachments: from rib to rib oriented from superior-lateral to inferior-medial (down and in)

Actions- elevation of ribs

Innervation- intercostal nerve (segmental)

Question 2

Internal & innermost intercostals

Answer 2

Attachments: from rib to rib oriented superior-medial to inferior-lateral (down and out)

Actions: depression of ribs

Innervation: intercostal nerve (segmental)

Question 3

Transversus thoracis

Answer 3

Attachments: from posterior sternum to costal cartilages

Actions: depress ribs

Innervation: intercostal nerves (segmental)

Question 4

Diaphragm (C3-5)

Answer 4

Attachments: from xiphoid process, inner surface of the lower ribs and costal cartilages, lumbar vertebrae via the crura to the central tendon

Actions: inspiration (negative thoracic pressure by inferior displacement)

Innervation: phrenic nerve

Question 5

Costovertebral

Answer 5

Synovial classification: plane

Question 6

Costotransverse

Answer 6

Synovial classification: plane

Question 7

Sternocostal

Answer 7

Synovial classification: plane

Question 8

Articular facet (head)

Answer 8

Ribs

Function: head articulates with body of vertebrae

Question 9

Articular facet (tubercle)

Answer 9

Costotubercular & costotransverse

Function: articulates with transverse process

Question 10

Costal groove

Answer 10

Ribs

Function: houses intercostal vein, artery and nerve

Question 11

Scalene tubercle (1st rib)

Answer 11

Attachments: anterior scalene muscle to 1st rib

Question 12

Clavicular notch/facet

Answer 12

Manubrium of sternum

Function: articulates with clavicle

Question 13

Costal notches/facets

Answer 13

Body of sternum

Function: articulate with ribs 2-7

Question 14

Xiphoid process

Answer 14

Sternum

Attachments: diaphragm