protocerebral neuroblast type I neuroblast neuroblast VPNd4 2013-05-22T11:24:12Z neuroblast VPNd4 Neuroblast that produces a secondary lineage of 93 approximately cells, with posterior somas, that collectively innervate the ipsilateral lobula, contralateral anterior and posterior ventrolateral protocerebrum and the superior lateral protocerebrum of both hemispheres (Ito et al., 2013). FBbt:00110389 VFB:FBbt_00110389 This lineage originates in the optic lobe and its neuroblast of origin has not been demonstrated in the larva (Schlegel et al., 2024 - FlyBase:FBrf0260535). fly_anatomy.ontology