Phrenic Nerve

Sunday, November 30, 2014

The phrenic nerve is an important efferent nerve which innervates the diaphragm, taking part in the medulla oblongata's automatic breathing functions. It originates at the third, fourth, and fifth spinal cord cervical roots of the cervical plexus. The both phrenic nerves (right and left) have connections with the breathing centers located in the medulla oblongata.