Kalmar "telencephalon" tana nufin sashin kwakwalwar kwakwalwa, wadanda su ne rabi biyu na cerebrum wadanda ke da alhakin tunani, jin dadi, da motsi na son rai. An samo kalmar daga kalmomin Helenanci "telos" ma'ana "ƙarshen" ko "manufa" da "enkephalos" ma'ana "kwakwalwa." A cikin sharuddan jiki, telencephalon shine mafi girman ɓangaren kwakwalwa kuma ya haɗa da cortex, basal ganglia, da tsarin limbic. Ya kasu kashi biyu, hagu da dama, kuma yana da alhakin ayyuka da yawa na fahimi da na motsa jiki, gami da fahimta, ƙwaƙwalwa, motsin rai, harshe, da yanke shawara.