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Divisive normalization models describe neural responses well in cases of

  • olfactory perception in drosophila,
  • visual processing in retina and V1,
  • possibly in other cortical areas,
  • modulation of responses through attention in visual cortex.

Divisive normalization is probably implemented through (GABA-ergic) inhibition in some cases (fruitfly olfactory system). In others (V1), it seems to be implemented by different means.

There is topographic mapping even in the olfactory system.