| Summary |
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| • | Touch path has
hierarchical organization |
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| – | Not bucket
brigade |
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| – | Message
transformed |
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| • | Several
mechanisms for enhancing spatial acuity |
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| – | Gradient of
excitation |
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| – | Surround
inhibition |
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| • | Columnar
organization of cortex |
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| – | Same input
(receptor and location) |
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| • | Intracortical
processing leads to integrated |
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| representation |
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