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Thorax
Less-obvious terms pertaining to gross anatomy of the thorax
45
Anatomy
Graduate
09/02/2012

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Term
Name and location for place inferior vena cave transects the diaphragm
Definition
Caval opening; most anterior of the openings in the diaphragm
Term
Name and location for place esophagus transects the diaphragm
Definition
esophageal hiatus; posterior to the caval opening and left of the midsagital plane.
Term
Name and location for place abdominal aorta transects the diaphragm
Definition
aortic hiatus; immediately anterior to spinal column and approximately on the parasagittal plane
Term
medial arcuate ligaments
Definition
the aponeurotic arches lateral to the vertebral bodies through which the psoas major passes behind the diaphragm
Term
lateral arcuate ligaments
Definition
the aponeurotic arches lateral to the medial arcuate ligaments through which the quadrates lomborum pass behind the diaphragm
Term
crura of the diaphragm
Definition
bands that arise from the anterior longitudal ligament of the 3 superior lumbar vertebrae and encircle the esophageal hiatus (right crus) and the and the aortic hiatus (contributions from both crura and the median arcuate ligament)
Term
vertebral level of caval foramen
Definition
T8
Term
vertebral level of esophageal Hiatus
Definition
T10
Term
vertebral level of aortic hiatus
Definition
T12
Term
esophageal hiatus (name all tracts which pass through)
Definition
esophagus, esophageal blood vessels (esophageal branches of l. gastric artery and l. gastric vein tributaries), anterior/posterior vagal trunks
Term
aortic hiatus (name all tracts which pass through)
Definition
aorta, thoracic duct and cistern chyli (of lymphatic system), azygous and hemiazygous vv.
Term
median arcuate ligament
Definition
Ligament that forms the base of the aortic hiatus
Term
arteries that directly supply breast tissue
Definition
medial and lateral mammary branches
Term
segmental arteries that supply mammary branches
Definition
internal thoracic -> anterior intercostals (medial); lateral thoracic (lateral)
Term
subareolar lymphatic plexus
Definition
network of lymph vessels that collects lymph from nipple, areola, and lobules
Term
main lymph node groups to receive lymph from subareolar lymphatic plexus
Definition
Parasternal lymph nodes and axillary lymph node group.
Term
Typical order of lymph (and thus breast cancer) progression in axillary lymph node group
Definition
1) pectoral (anterior) 2) subscapular (posterior) 3) central 4) apical
Term
Most common breast quadrant for breast tumors
Definition
Upper Outer
Term
describes dense connective tissue deep to breast
Definition
retromammary fascia
Term
fascial plane deep to superficial fascia deep to breast
Definition
retromammary spac
Term
nerves that contribute to supply of superior quadrants of breast
Definition
supraclavicular nn. (from cervical plexus)
Term
dermatomes that include nipple
Definition
T4/T5
Term
ribs that support base of breast
Definition
ribs 2-6
Term
True or false - GVA's are part of ANS
Definition
False! ANS includes only motor neurons.
Term
name of narrowing at inferior end of spinal cord
Definition
conus medullaris
Term
lumbar vertebrae housing the inferior termination of spinal cord
Definition
L2 (L4-L5 in young children)
Term
Only branches of ascending aorta
Definition
R+L coronary arteries (fill during diastole)
Term
Approximate superficial thoracic surface corresponding to the proximal portion of the aortic arch
Definition
In the transverse thoracic plane, at the 2nd sternocostal joint.
Term
Verebra corresponding to branches of aortic arch
Definition
T3
Term
location on superficial thorax corresponding to confluence of L and R brachiocephalics
Definition
R 1st costal cartilage
Term
location on superficial thorax corresponding to confluence of internal jugular and subclavian (venous angle)
Definition
sternal end of clavicle
Term
which brachiocephalic is longer
Definition
Left (since they merge on R side of thorax)
Term
type of cell-cell connections used to convey action potentials in heart conduction system
Definition
myogenic (gap-junction) conduction (i.e., not a synapse)
Term
what is the connective tissue between lateral masses of c1?
-what structure lies anterior to this in situ?
Definition
Te transverse ligament
-the dens of C2
Term
which vertebrae have bifid spinous processes?
Definition
C2-6
Term
which tissues are parasympathetic nerves never found in?
Definition
Body wall, smooth muscle of b. vessels (exception is aorta), limbs, sweat glands and erector pili.
Term
which GVA's carry pyrosis signals to the spinal cord?
Definition
T8-10 GVAs
Term
which arteries supply the
-upper
-middle
-lower esophagus?
Definition
- branch of inf. thyroid
- esophageal branches of desc. thorac. aorta
- L. gastric
Term
what drains the esophageal veinous system?
Definition
top- inf. thyroid veins
middle- azygous tributaries
bottom- L. gastric
Term
How does a sympathetic-accompanying VGA enter and exit the sympathetic chain
Definition
enter- gray rami communicans (then can change level if needed)
exit - white rami communicans
Term
Which intercostals act during
-deep inspiration?
-forced expiratioon?
Definition
Inspiration - External intercostals, interchondral portion of internal intercostals
expiration - internal intercostals (interosseus portion) and innermost intercostals.
Term
which nerve fiber type does the phrenic nerve lack?
Definition
GVAs
Term
most common variant in aortic arch branching?
Definition
Two-branch variant with one brachiocephalic trunk (containing erly branch of LCC) and one L. subclavian coming off archl
Term
tetrology of fallot
Definition
-stenosis in part of the pulmonary vein before branching
-Vent. septal defect
-dextroposition of aorta (so receives L. and R. ventral blood)
-RV hypertrophy - patent ductus arteriosus causes R. vent to receive L. vent pushing
Term
coarctation of aorta
Definition
constriction of aorta, so blood flows through enlarged intercostal/internal thoracic artery to reach descending aorta.
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