Anterior Thorax Flashcards
Which ribs are “False ribs”
8-12
Which ribs are “True ribs”?
1-7
Which ribs are the “Floating ribs”?
13, 14
What type of joint is the costovertebral joint?
Plane synovial joint
What type of joint is the costotransverse joint?
plane synovial joint
What are the boundaries of the superior thoracic aperture/thoracic outlet?
T1, Rib 1, manubrium
What structures pass through the thoracic outlet?
Brachial plexus, subclavian vessels
What are the boundaries of the inferior thoracic aperture?
Body of T12, costal margin, xiphoid process
What rib connects at the sternal angle?
Rib 2 connects here
What important landmarks are behind the sternal angle?
Bifurcation of trachea
Aortic arch
Superior border of pulmonary trunk
SVC enters pericardium
2nd intercostal space
What is the most common fracture point of the ribs?
Angle
Intercostal veins, arteries, and nerves rest in what rib structure?
Costal groove
What does the rib’s tubercle articulate with?
Transverse process of vertebrae
What two vertebrae does rib 8 articulate with?
T7 and T8
Hands in the pockets represent the striation of which intercostal muscle group?
External intercostals
Arms crossed on shoulders represent striations of which intercostal muscle group?
Internal intercostals
What is the role of external intercostals?
Elevate inferior rib for forced inspiration
What is the role of internal intercostal muscles?
Depress ribs during forced expiration
What do the internal intercostals become as you proceed posteriorly across the thoracic cavity?
Internal intercostal membrane
What is the role of the innermost intercostals?
Same as internal intercostals
What artery runs adjacent to the sternum and supplies the intercostal space with blood vessel branches?
Internal thoracic artery
What is the internal thoracic artery a branch of?
Subclavian artery
What does the interior thoracic artery branch bifurcate into?
Superior epigastric artery and musculophrenic artery
Which nerves supply the abdominal muscles?
T7-12
