Posterior Mediastinum

Posterior Mediastinum - Term Definition Superior boundary...

Info icon This preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Term: Superior boundary Definition: Transverse plane passing from the sternal angle to the intervertebral disc between vertebrae T4/T5. Term: Inferior boundary Definition: Diaphragm. Term: Laterally Definition: Mediastinal part of parietal pleura on either side. Term: Superiorly, it is continuous with Definition: the superior mediastinum. Term: Esophagus is a Definition: muscular tube passing between the pharynx in the neck and the stomach in the abdomen.
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Term: It begins at the Definition: inferior border of the cricoid cartilage, opposite vertebra C6, and ends at the cardiac opening of the stomach, opposite T11 Term: Esophagus has a slight anterior-to-posterior Definition: curvature that parallels the thoracic portion of the vertebral column. Term: It is secured superiorly by Definition: its attachment to the pharynx Term: Inferiorly by Definition: its attachment to the diaphragm.
Image of page 2
Term: Four areas where the esophagus may be compressed: Definition: - Junction of the esophagus with the pharynx in the neck. - Superior mediastinum where the esophagus is crossed by the arch of aorta. - Pos mediastinum where the esophagus is compressed by the left main bronchus. - Pos mediastinum at the esophageal hiatus in the diaphragm. Term: An ingested corrosive substance would move more slowly Definition: through a narrowed region, causing more damage at this site. Term: Esophageal arteries arise from Definition: The thoracic aorta, bronchial arteries, and ascending branches of the left gastric artery in the abdomen. Term: Venous drainage involves small vessels returning to the Definition: azygos vein, hemiazygos vein, and esophageal branches to the left gastric vein in the abdomen.
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Term: Lymphatic drainage of the esophagus in the posterior mediastinum returns to Definition: posterior mediastinal and left gastric nodes. Term: Esophageal branches arise from Definition: Vagus NErves and sympathetic trunks Term: Striated muscle fibers in the superior portion of the esophagus originate from the Definition: brachial arches and are innervated by brachial efferents from the vagus nerves. Term: Smooth muscle fibers are innervated by Definition: parasympathetic part of the Autonomic division of the PNS, visceral efferents from vagus nerves. Term: What are they? Definition: Preganglionic fibers that synapse in the myenteric and submucosal plexuses of the enteric nervous system in the esophageal wall.
Image of page 4
Term: Sensory innervation of the esophagus Definition: Involves the visceral afferent fibers originating in the vagus nerves, sympathetic trunks, and splanchnic nerves.
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern