thorax LOs Flashcards
1
Q
boundaries/contents of thoracic cavity and compartments
A
- boundaries:
- posterior: spine
- anterior: sternum
- inferior: diaphragm
- superior: superior thoracic aperature
- contains organs of respiratory and cardiovascular systems
- right and left pleural cavities (lungs), superior and inferior mediastinum
2
Q
components/functions of thoracic wall
A
- components: skin, subcutaneous tissue, ribs, intercostal muscles
- functions: protection, respiration, muscle attachment
3
Q
ID the 3 types of ribs
A
- true: 1-7
- direct cartilaginous connection to sternum
- false: 8-10
- indicrent connection to sternum
- floating: 11-12
- do not attach
4
Q
general structure of a rib
A
5
Q
3 rib joints and their synovial classifications
A
- costovertebral: head of rib > vertebral body
- plane
- costotransverse: costal tubercle > transverse process
- plane
- sternocostal: sternum > costal cartilage
- plane
6
Q
unique landmarks of first rib
A
- scalene tubercle: swelling for anterior scalene muscle
- grooves for subclavian artery and vein
- vein anterior to artery
- anterior scalene muscule anterior to subclavian artery
7
Q
unique landmarks of sternum
A
- manubrium: jugular notch, clavicular notch/facet
- body: sternal angle between manubrium and body, costal notches/facets
- xiphoid process
8
Q
action/segmental and peripheral nerve innervation of diaphragm
A
- dome-shaped when relaxed
- flat when constricted
- constriction creates inferior displacement
- increases volume of thoracic cavity
- phrenic nerve (C3-5)
9
Q
naming convention for intercostal nerves (T1-T12)
A
- intercostal (T1-6): upper intercostal nerves
- thoracoabdominal (T7-11): lower intercostal nerves
- subcostal (T12)
10
Q
ID major landmarks of innervation of thoracic wall
A
- T4: nipple
- T6: skin over xiphoid process
- T10: includes umbilicus
