Background: Zinc oxide nanoparticles (ZnONPs) are one of metal nanoparticles that have widespread use in many fields.Objective: To investigate the effect of ZnONPs on cerebellar cortex of rats through histological and immunohistochemical study.Materials and methods: Thirty adult male albino rats were divided into three groups; group I (control), Group II (ZnONP-1 treated group) which received oral...