does the cervical plexus include the phrenic nerve
The phrenic nerve is a mixed motor/sensory nerve that courses through the neck and thorax to innervate the diaphragm. Arises from the ventral rami of the C3, C4 and C5 nerve roots, part of the cervical plexus.he phrenic nerve is the sole motor supply to each hemidiaphragm. It also provides sensory supply to: 1  diaphragm (except the most peripheral diaphragm, which is supplied by intercostal nerves). 2  mediastinal pleura. 3  pericardium. 4  central parts of diaphragmatic pleura and peritoneum.