Sensory DeprivationVibrissaeSomatosensory CortexNeuronal PlasticityEvoked Potentials, SomatosensoryOlfactory BulbAfferent PathwaysSleep DeprivationAnimals, NewbornCerebral CortexBrain MappingNeuronsVisual CortexSynapsesBrain ChemistryMice, Inbred C57BLWater DeprivationBrain InjuriesFood DeprivationBrain NeoplasmsPsychosocial DeprivationBrainCultural Deprivation