Recently there's been some conjecture that bioelectricity guides embryonic development as well: https://www.quantamagazine.org/brainless-embryos-suggest-bioelec

Recently there's been some conjecture that bioelectricity guides embryonic development as well: https://www.quantamagazine.org/brainless-embryos-suggest-bioelectricity-guides-growth-20180313/ https://www.quantamagazine.org/brainless-embryos-suggest-bio... From a layman's perspective, there are some really exciting developments happening in the field of morphogenesis!