Me ya sa muke shakkar wasu, kuma menene tushen shakka?

Masu bincike kwanan nan sun gano cewa marasa lafiya da suka sami lahani ga ventromedial prefrontal cortex (wanda ke bayan idanu), suna da "rashin shakku", saboda sun kasance masu butulci na yau da kullun don mayar da martani ga tallace-tallacen yaudara: tallan wani abu mai kyau da zai zama ainihin analgesic. . Amma yana da mahimmanci a lura cewa yana da matukar wahala a haɗa haɗaɗɗun yanayi na tunani - kamar ƙwarewar shakku - zuwa takamaiman sassan kwakwalwa. Yawancin sauran yankuna na jijiyoyi suna iya shiga cikin kwarewar sirri na shakku, gami da yankuna masu motsi, kuma an binne su a cikin kwakwalwa.