Somatic twist: a model for the evolution of decussation.

@article{Kinsbourne2013SomaticTA,
  title={Somatic twist: a model for the evolution of decussation.},
  author={M. Kinsbourne},
  journal={Neuropsychology},
  year={2013},
  volume={27 5},
  pages={
          511-5
        }
}
OBJECTIVE In the chordate and vertebrate central nervous system, sensory and motor nerve tracts cross from one side to the other as they connect the brain with sensory receptors and motor neurons. These "decussations," crossings in the form of an X, relate each side of the brain to the opposite side of the body. The protochordates derive from an invertebrate ancestor, but no such contralateral arrangement occurs in any invertebrate phylum. No adaptive benefit of decussation has been established… Expand
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