Ko te akoranga tuatahi o te tinana ki te whanaungatanga ki te ira tangata i R. B. Bean, he Philadelphia anatomist, nana nei i whakaaro i roto i 1906 e "te rahi motuhake o te tinana callosum kia tikanga mahi hinengaro motuhake" me i reira i te rerekētanga meangiti i waenganui i te tangata, me te wahine. pea whakaata i te āhuarangi tōrangapū o nga wa, haere ia ki te kerēme rerekētanga i roto i te rahi o te callosum puta noa iwi rerekē. i te mutunga i whakakahoretia tona rangahau e Franklin Mall, te kaiwhakahaere o tona ake taiwhanga. o te pānga atu mainstream ko te 1982 Science tuhinga e Holloway me Utams e tohu rerekētanga i roto i te morphology ira tangata, e pā ana ki rerekētanga i roto i te kaha mōhiotanga. whakaputaina he tuhinga i roto i te 1992 e whakaaro e, no te mea ko te tinana "te nui ake i roto i nga roro o nga wahine i roto i te tangata o Amerika, kia tukua ai mo te nui ake-kōkōkō te mahi hinengaro" me i reira i reira i te
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