Anatomy

Question 1

Vagus N. branches in the thorax

Answer 1

recurrent laryngeal n., pulmonary and inferior cardiac branches, esophageal branches, and anterior and posterior esophageal trunk

PARASYMPATHETIC INNERVATION

Question 2

Phrenic N. Innervation

Answer 2

Diaphragm, sensory info from diaphragmatic and mediastinal pleura and pericardium

Question 3

What makes T1 an atypical nerve?

Answer 3

part of the brachial plexus, does not provide cutaneous branches

Question 4

What makes a thoracic spinal nerve “typical?”

Answer 4

rami communicantes connects the intercostal nerve to the sympathetic trunk, it provides collateral branches for musculature and cutaneous branches

Question 5

What makes T2 an atypical nerve?

Answer 5

Travels in the costal groove and supplies the skin as intercostobrachial n.

Question 6

What makes T7-T11 atypical nerves?

Answer 6

Begin as intercostal n. but transition to thoracoabdominal n.

Question 7

What are the sympathetic nerves in the thorax?

Answer 7

paravertebral sympathetic ganglia, cardiac splanchnic nerve, pulmonary splanchnic nerve, greater, lesser, and least splanchnic ns.

Question 8

What are the parasympathetic nerves in the thorax?

Answer 8

Vagus n. - superior, middle, and inferior cardiac branch, pulmonary and esophageal branches

Question 9

Sympathetic innervation of pulmonary plexus and associated function

Answer 9

pulmonary splanchnic ns., bronchodilate, inhibit bronchi glands, vasoconstrict pulmonary vessels, visceral sensory information.

Question 10

Parasympathetic innervation of pulmonary plexus and associated function

Answer 10

pulmonary branches of the vagus n., acts as a bronchoconstrictor, glands secrete, vasodilation of pulmonary vessels, cough reflex, pressure and chemoreceptors

Question 11

Sympathetic innervation of cardiac plexus and associated function

Answer 11

cardiac splanchnic n., increase heart rate and contractility, vasomotor input to pericardium

Question 12

Parasympathetic innervation of cardiac plexus and associated function

Answer 12

cardiac branches of vagus n., decrease heart rate and contractility, vasoconstrict coronary as.

Question 13

Sympathetic innervation of esophageal plexus and associated function

Answer 13

greater splanchnic nerve and aortic plexus, inhibits peristalsis and esophageal glands

Question 14

Parasympathetic innervation of esophageal plexus and associated function

Answer 14

vagus n. stimulates glands and smooth muscle of the esophagus