I learn about the brain right now, and there are crossing of neuron pathways everywhere; in the thalamus, the medulla oblongata, the pyramidal tract... And I don't understand why? What is the reason to connect - for example - the right foot to the left part of your brain?

  • $\begingroup$ Possible duplicate: Here and especially here. $\endgroup$
    – Remi.b
    Commented Apr 6, 2014 at 20:41

1 Answer 1


Crossing or decussation is a lot more robust against wiring errors than their seemingly simpler same-sided wiring counterparts. See here for the research carried out to establish this and for more detail.


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