The three principles with regards to the sensory cortex(mechanisms of perception), with one of them being hierarchicalorganization. Using the somatosensory system as an example(specifically the exteroceptive part of that system),
--> State each level of the hierarchy with regards to thissystem, beginning with the one at the lowest level of the hierarchyto the final uppermost level. You must give the name at each levelas it corresponds with this system. (Explain Thoroughly Please)