Nws yog ib qho khoom siv uas tuaj yeem ua rau dhia hauv ib lossis ntau qhov hluav taws xob tso tawm hluav taws xob thaum lub input kom muaj nuj nqis (lossis excitation kom muaj nuj nqis) ua tau raws li qee yam kev cai. Yuav siv tau los ua ib qho kev taw qhia rau xoom sequence tam sim no tiv thaiv nyob rau hauv nruab nrab ncaj qha grounded systems.