The high cost of maintaining resting potentials in all 86 billion neurons means that little energy is left to propel signals down axons and across synapses, the nerve discharges that actually get things done.
O alto custo de manutenção  de potenciais de repouso nos 86 mil milhões de neurónios significa que sobra pouca energia para impulsionar sinais  pelos axónios e sinapses, as descargas nervosas  que realmente fazem as coisas.