Isikhathi eside, ososayensi babekholelwa ukuthi ikhono lokuphupha lizalwa ngabantu kuphela, ngaleso sikhathi okwakukholakala ukuthi yizona kuphela izidalwa eziphilayo ezinolwazi. Muva nje, nokho, leli phuzu libukisiwe, futhi manje ososayensi bakwazile ukufakazela ukuthi izilwane zinikwe amandla okubona amaphupho.
Kodwa-ke, ososayensi abagcini ekukhulumeni leli qiniso, futhi ngasikhathi sinye bathola okuqukethwe amaphupho izilwane eziwabonayo. Lokhu kwenziwa lapho ososayensi bezinto zebhayoloji befaka ama-electrode akhethekile ezifundeni zobuchopho ezibhekele ukuqondiswa kwesikhala, imizwa nenkumbulo. Ngenxa yalokhu, izinhlaka zemibono emisha mayelana nokuthi kwenzekani ezilwaneni ephusheni zaqala ukucaca.
Ukuhlaziywa kolwazi oluqoqiwe kukhombisile ukuthi, ngokwesibonelo, kumagundane, ukulala, njengabantu, kunezigaba ezimbili. Okuthakazelisa kakhulu ukuthi isigaba esisodwa sokulala kumagundane cishe asikwazi ukuhlukaniswa ezinkomba zaso kusuka esimweni sokuvuka kwalezi zilwane (sikhuluma ngesigaba okuthiwa sesokulala kwe-REM). Ngalesi sigaba, abantu futhi banamaphupho ahambisana nokwanda komfutho wegazi nokusebenza komzimba.
Ukuhlolwa okwenziwe ezinyonini zezingoma nakho bekuthakazelisa kangako. Ikakhulukazi, kwavela ukuthi onondweba abanemigqa bacula ngentshiseko emaphusheni abo. Lokhu kubheka kusivumela ukuba siphethe ngokuthi ezilwaneni, njengasebantwini, amaphupho, okungenani ngokwengxenye, akhombisa okungokoqobo.
