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Anatomy III: Thoracic Wall and Cavity
Terms in this set (71)
What are the 3 parts of the sternum?
Manubrium, body, xiphoid process
What is another name for the jugular notch?
In the horizontal plane, the jugular notch cooresponds to the IVD between T__ and T__.
The sternal ends of the clavicle articulate at the ____ notches.
What is the name for the angle found at the manubiosternal joint?
The cartilage of the ____ rib articulates at the sternal angle.
In the horizontal plane, the sternal angle corresponds to the IVD between T__ and T__.
Which ribs are considered true?
Which ribs are considered false?
Which ribs are considered floating?
How many articular facets do typical ribs have?
What separates the articular facets of a typical rib?
Crest of rib head
What two structures do the articular facets of typical ribs articulate with?
Same numbered vertebrae and superior vertebrae
Where are the intercostal nerves and vessels located on a typical rib?
Which ribs are considered typical?
What type of joint exists between the sternum and the 1st costal cartilages?
Primary cartilaginous joint (synchondrosis)
What type of joint is found between the sternum and the cartilages of ribs 2-7?
Synovial plane joint
What bony landmark on the 1st rib separates the grooves of the subclavian vessels?
What is another name for the superior thoracic aperature?
What is another name for the inferior thoracic aperature?
What is the origin of the external intercostal muscle?
Inferior border of ribs above
What is the insertion of the external intercostal muscle?
Superior border of ribs below
What is the action of the external intercostal muscle?
Elevate ribs during forced inspiration
What innervates the external intercostal muscle?
What tissue replaces the external intercostal muscle fibers anteriorly?
External intercostal membrane
What is the origin of the internal intercostal muscle?
Superior border of ribs below
What is the insertion of the internal intercostal muscle?
Inferior border of ribs above
What is the action of the internal intercostal muscle?
Depresses and elevates ribs during forced respiration
What innervates the internal intercostal muscel?
What tissue replaces the internal intercostal muscle fibers posteriorly?
Internal intercostal membrane
What separates the internal intercostals from the innermost intercostal muscle?
Intercostal nerves and vessels
What is composed of musclular slips that extend from the internal surface of the angle of a rib to the internal surface of the rib inferior to it?
What is the origin of the transverse thoracis muscle?
Lower 1/3 of posterior surface of sternum
What is the insertion of the transverse thoracis muscle?
Internal surfaces of costal cartilages 2-6
What is the action of the transverse thoracis muscle?
Weakly depress costal cartilages
What innervates the trans versus thoracis muscle?
How many pairs of thoracic spinal nerves are there?
Where do the thoracic spinal nerves exit the vertebral canal?
What do the thoracic spinal nerve divide into?
VPR and DPR
What innervates deep back muscles, skin of the back, and z-joints?
What pass to the inferior surface of the neck of the corresponding rib which it runs under?
What is the VPR of T12 referred to as?
Which thoracic ventral ramus contributes to the brachial plexus?
What is the name of the lateral cutaneous branch of the 2nd intercostal nerve?
Intercostobranchial cutanous nerve
What kind of autonomic nerve fibers are contained in the cutaneous branches of intercostal nerves?
What structures are innervated by the postsynapic fibers in the cutaneous branches of the intercostal nerves?
Blood vessels, sweat glands, smooth muscle of body wall and limbs
What runs superior to intercostal nerves?
What runs inferior to intercostal veins?
Which posterior intercostal arteries are direct branches of the descending thoracic aorta?
Which intercostal spaces are supplied by the supreme intercostal artery?
What branch of the subclavian artery gives rise to the supreme intercostal artery?
Where does the internal thoracic artery arise?
Root of the neck from the inferior surfaces of the first part of the subclavian artery
What muscle does the internal thoracic artery pass anterior to?
What anterior intercostal arteries arise from the internal thoracic artery?
What artery gives rise to the 7th-9th anterior intercostal arteries?
What is the most superior structure in the costal grooves?
Veins of thoracic wall
How many intercostal veins are there?
How many subcostal veins are there?
Into what do the posterior intercostal veins drain?
Azygos system of veins
Into what does the azygos system of veins drain into?
Superior vena cava
What are the 3 major spaces within the thoracic cavity?
2 pleural cavities, 1 mediastinum
Are the lungs located in the pleural sacs?
Are the lungs surrounded by the pleural sacs?
What is the potential space between the parietal and visceral pleura referred to as?
What is the inner layer of pleura that reflects onto the external surface of lungs?
What is the outer layer of pleura that lines the pleural cavities?
What are the 4 portions of parietal pleura?
Costal, mediastinal, diaphragmatic, cervical
What tissue separates the parietal pleura from the internal surface of the structures that comprise the thoracic wall?
What are the 3 lines of pleural reflection?
Sternal, costal, mediastinal
What is the junction of the costal and diaphragmatic portions of parietal pleura?
What is the compartment between two pleural cavities referrred to as?
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