Kalmar “paleostriatum” kalma ce da ake amfani da ita a fannin kimiyyar kwakwalwa don yin nuni ga wani tsari a cikin kwakwalwa da ake samu a cikin tsuntsaye da dabbobi masu rarrafe. Musamman, yana nufin wani sashe na basal ganglia, wanda rukuni ne na nuclei da ke zurfi a cikin kwakwalwar kwakwalwar kwakwalwa. , "kuma yana shiga cikin ayyuka daban-daban masu alaka da motsi da kuzari. A cikin tsuntsaye, yana da mahimmanci musamman don sarrafa murya da koyan waƙoƙi.A cikin mutane da sauran dabbobi masu shayarwa, tsarin da ya dace da shi shi ake kira "striatum," kuma yana taka rawa irin wannan wajen daidaita motsi da motsa jiki. Duk da haka, ana ɗaukar paleostriatum a matsayin wani nau'i na farko na wannan tsari, kuma ayyukansa sun ɗan bambanta da na striatum a cikin dabbobi masu shayarwa.