<prompt> Which body part has maximum representation in CNS?Urinary BladderLower limbAbdomenThumb  <response>: Somatosensory cortical areasPrimary- Post central gyrusAssociation area- parietal lobeSecondary area- sylvian fissuresize of the cortical receiving area for impulses from a particular part of the body is proportional to the use of the partThumb and lips-maximum representationVertical columnar arrangement 