Question: is the phrenic nerve sympathetic or parasympathetic?
Answer: The nerves that we'll see are the phrenic nerve, the vagus nerve, the sympathetic trunk, and the intercostal nerves. We'll look at the phrenic and vagus nerves first. The phrenic is the motor and sensory nerve of the diaphragm. The vagus provides the parasympathetic supply for all the organs of the thorax and abdomen.