stage 2 neuroblast neuroblast NB1-2 VFB:FBbt_00001384 Originally referred to as NB1-1 by Doe (1992), this was renamed to NB1-2 by Broadus et al. (1995) to reflect the fact that it is the only engrailed-expressing anterior row neuroblast in both Drosophila and Schistocerca. lineage NB1-2 neuroblast neuroblast NB1-2 NB 1 neuroblast 1 Neuroblast that delaminates in the S2 wave and generates 4-6 intersegmental interneurons. It also produces approximately 20 local interneurons and, in thoracic segments, the semaphorin II (FBgn0011260) positive DC motorneuron. In the embryo, one of these cells can be found in each hemisegment from S2-A9 (Birkholz et al., 2013; Urbach et al., 2016). In the larva, it resumes proliferation in all thoracic segments and the first abdominal segment, generating secondary lineage 1 (Lacin and Truman, 2016). lineage 1 neuroblast fly_anatomy.ontology FBbt:00001384 segmentally-repeated neuroblast