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Stack #36574

Thorax Miscellaneous

QuestionAnswer
superior mediastinum above imaginary line from sternal angle to T4/T5
superior mediatstinum contains thymus, brachiocephalic vv. & SVC, aortic arch & branches; vagus, phrenic, l. recurrent laryngeal nn., cardiac plexus, esophagus, thoracic duct
phrenic nerves descend lateral & anterior to vagus nn.
R. recurrent laryngeal n. (from r. vagus n.) curves aroung r. subclavian a. (brachicephalic trunk) to swing superiorly
L. recurrent laryngeal n. departs from L. vagus to loop under arch of aorta before ascending
Phrenic nerves innervate pericardium & diaphragm
Vagus nerves contribute to cardiac & pulmonary plexuses then form esophageal plexus & travel w/esophagus into abdomen
On Right, autonomics form deep cardiace plexus along bifurcation of trachea
R. vagal trunk swings posteriorly to form posterior esophageal plexus
On Left, autonomics form superficial cardiac plexus along anterior surface of aortic arch
L. vagal trunk forms anterior esophageal plexus
sympathetic trunks pass posterior to diaphrahm to enter abdomen
thoracic spalanchnic nn. (preganglionic sympathetic fibers descending into abdomen) - greater, lesser, least
Greater spalanchnic n. from T5-T9
Lesser spalanchnic n. from T10-111
Least spalanchnic n. from T12
Azygos venous system originates w/ascending lumbar vv. in abdomen
Azygos v. complete on R. side & empties into SVC
Azygos v. receives blood from hemiazygos & accessory hemiazygos on L. side
Upper 3 or 4 intercostal spaces on left drain superiorly into L. superior intercostal v.
Abdominal Fascia superficial, deep, transversalis, parietal peritoneum
Superficial abdominal fascia camper's & scarpa's
Campers fat outer, fatty
Scarpas fat inner, membranous
Deep Abdominal Fascia invests mm.
Transversalis abdominal fascia deep to transversus abdominis, incomplete
Arcuate Line - above aponeurosis of internal oblique & transversaus abdominis contribute to the posterior of rectus sheath
Arcuate Line - below only transversalis fascia separates rectus m. from peritoneum
dermatomal landmarks-T4 nipple
dermatomal landmarks-T7 xiphoid process
dermatomal landmarks-T10 umbilicus
dermatomal landmarks-T12 top of pubic symphysis
Created by: JYarger