<prompt> Root value of biceps jerk?C5C6C4C5C6C7c8T1  <response>: Ans. a C5 C6. Ref. Ganong, Physiology, 21stpg. l30SPINAL LEVELREFLEXC5-6SupinatorC5-6BicepsC7TricepsL3-4KneeS1AnkleEducational points:Spinal Cord Levels Relative to the Vertebral BodiesSpinal Cord LevelCorresponding Vertebral BodyUpper cervicalSame as cord levelLower cervical1 level higherUpper thoracic2 levels higherLower thoracic2 to 3 levels higherLumbarT10-T12SacralT12-L1 