We talk about the brain, but of course every brain is slightly different, and maybe there are some individuals or some conditions in which the electrical properties of neurons are such that they require more stimulus to fire, and that would lead to differences in brain function.
Estamos a falar do cérebro, mas, claro, todos os cérebros  são um pouco diferentes, e talvez haja alguns indivíduos ou certas condições em que as propriedades  elétricas dos neurónios são tais que exigem  mais estímulos para se excitarem. Isso levaria a diferenças na função cerebral.