Links related to the Hering Breuer Reflex Laboratory
Modeling Neural Mechanisms for the Respiratory Rhythm and Pattern Generation
Where Are The Nerves?
The
phrenic nerve arises in the neck from C3,4,5 roots. It
lies on the scalenus anterior muscle and enters the thorax between the
subclavian artery and the subclavian vein. The nerve then courses down
the mediastinum lying anterior to the hilum of the lung and squeezed between
the pleura and the pericardium. The nerves at this point supply sensory
fibres to the mediastinal pleura and pericardium. The right phrenic nerve
then passes through the diaphragm close to the inferior vena cava in the
central tendon. The left phrenic passes through the muscular part of the
diaphragm. The nerves supply motor fibres to the diaphragm and sensory
fibres to the diaphragmatic pleura and peritoneum.
The phrenic nerve is the only motor supply to the diaphragm.
The vagus
nerve you have isolated many times before.