Medicine and Health related Information

The diaphragm develops in the region of the neck in the septum transversum. Here it receives the nerve supplying from cervical plexus c3,4,5. The same nerve is dragged downwards during its descent. It indicates to caudal direction during development.

The whole of the diaphragm is developed from -

a) Septum transversum- gives rise to lateral and hence supplied by the nerve of septum transversum called the phrenic nerve.

b) Pleuro-peritoneal membrane- It gives rise to the lateral part of diaphragm. It closes the pleuro peritoneal canal.

c) Mesentry of Oesophagus (Both Ventral and Lateral)- gives rise to the crura and posterior part of the diaphragm.

d) The Body wall proliferates and gives rise to peripheral part of the diaphragm. It is supplied of lower intercostal nerves which are sensory.

Diaphragmatic HERNIA-
Somatopleuric peritoneal membrane may be absent which causes an opening in the diaphragm. Hence any abdominal organs can extend into the thorax and is called “DIAPHRAGMATIC HERNIA”.