What is the motor supply of the diaphragm?
Phrenic nerve
C2, C3, C4 Roots
Thoracodorsal nerve
Long thoracic nerve
Ans. is 'a' i.e., Phrenic nerve Diaphragm OrigininsertionNerve supply1.Sternal partPosterior surface of xiphoid process.* All fibers converge to insert into central tendon* MotorPhrenic nerve (C3C4C5).* Sensoryi) Centrally by phrenic nerve.ii) Peripherally by lower 6 intercostal nerves.2.Costal partInner aspect of lower 6 ribs.3.Lumbar part-i) Right crusUpper 3 lumbar vertebral bodies.ii) Left crus Upper 2 lumbar vertebral bodies.iii) From medial arcuate ligament (medial lumbocostal arch).iv) From lateral arcuate ligament (lateral lumbocostal arch).
Thorax