Eno ye matiiriyo ya nyuloni (neurons), obutaffaalikazimbabusimu oba obutaffaalikazimbabwongo, esangibwa mu mutwe, omuli sayansi w’ebirowoozo n’okukwanaganya buli kigenda mu maaso mu mubiri. Buli ekiva mu bwongo eky’obwakalimagezi kifulumuzibwa mulengera (the mind) atalabika. Obwongo bulimu ebitundu 40%) nga bya matiiriyo eya kivuuvu (gray matter) ate ebitundu 60% nga matiiriyo enjeru. Busangibwa wakati mu kawanga munda, akabukuuma obutatuukibwako buvune kuba obwongo kintu kya kwegendereza nnyo.