The phrenic nerve is a nerve that originates in the neck and passes down between the lung and heart to reach the diaphragm. It is important for breathing, as it passes motor information to the diaphragm and receives sensory information from it. There are two phrenic nerves, a left and a right one.
The phrenic nerve originates mainly from the 4th cervical nerve, but also receives contributions from the 5th and 3rd cervical nerves (C3-C5) in humans.
The phrenic nerves contain motor, sensory, and sympathetic nerve fibers. These nerves provide the only motor supply to the diaphragm as well as sensation to the central tendon. In the thorax, each phrenic nerve supplies the mediastinal pleura and pericardium.
Other articles related to "phrenic nerve":
... is performed by placing an electrode around the phrenic nerve, either in the neck (ie, cervically), or in the chest (ie, thoracically) ... For the cervical surgical technique, the phrenic nerve is approached via a small (~5 cm) incision slightly above, and midline to, the clavic ... The phrenic nerve is then isolated under the scalenus anticus muscle ...
... Diaphragm Pacing, also known as phrenic nerve pacing, is the rhythmic application of electrical impulses to the diaphragm, resulting in respiration ... although the Food and Drug Administration identifies the device as a “diaphragmatic/phrenic nerve stimulator” ... A phrenic nerve pacemaker, with electrodes placed around the phrenic nerve, is a Class III medical device, which requires premarket approval ...
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