SEELE is the German word for soul, GEHIRN means brain. It can be assumed that GEHIRN is named this way because it seems to consist mostly of scientists (mankinds rational side), while SEELE seems to consist of humans spiritual side. NERV is the German word for nerve, often used in a medical context. So together, SEELE, GEHIRN and NERV can be seen as making up a human.

SerieTv