neurobiotaxis

noun
neu·ro·bio·tax·is | \-ˌbī-ō-ˈtak-səs \
plural neurobiotaxes\-ˌsēz \

Medical Definition of neurobiotaxis 

: a hypothetical directed and oriented shift of nerve cells in the course of phylogeny toward a region of maximum stimulation that has been held to explain cephalization and brain evolution

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