<prompt> What is the motor supply of the diaphragm?Phrenic nerveC2, C3, C4 RootsThoracodorsal nerveLong thoracic nerve  <response>: 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. 