protocerebral neuroblast type I neuroblast neuroblast BLD1 2011-07-11T03:33:13Z neuroblast BLD1 VFB:FBbt_00100620 Most anterior neuroblast in the BLD group (Pereanu and Hartenstein, 2006). It has descendants that enter the superior lateral protocerebrum and join the intermediate superior transverse fascicle (Lovick et al., 2013; Hartenstein et al., 2015). At the secondary stage, one hemilineage continues to follow this route and another follows a more ventrally-directed tract along the surface of the posterior ventrolateral protocerebrum (Lovick et al., 2013). FBbt:00100620 fly_anatomy.ontology neuroblast LHl4 neuroblast BLD