Diaphragm Innervation

Monday, December 28, 2015

The diaphragm, which is a muscular membrane that separates the abdominal from the thoracic cavities, is innervated by the phrenic nerve, which arises from the cervical segment of the spinal cord, from C3 to C5, with C4 contributing with about 70% of the fibers that compose it. The motor innervation of the diaphragm has its nerve center in the reticular formation of the medulla oblongata, which sends motor signals to the diaphragm through the phrenic nerve.