stage 4 neuroblast neuroblast NB5-4 neuroblast 22 lineage 22 neuroblast NB 22 FBbt:00001416 VFB:FBbt_00001416 Neuroblast that most frequently delaminates at S4 (Schmid et al., 1997). In the embryo, one of these cells can be found in each hemisegment from S3-A10 (Birkholz et al., 2013; Urbach et al., 2016). In the larva, it resumes proliferation in all thoracic segments (Lacin and Truman, 2016) and in the male abdominal 9 neuromere (Birkholz et al., 2013). The neurons that develop from this neuroblast after larval hatching form postembryonic lineage 22 (Lacin and Truman, 2016). Using DiI with antibody labelling, Schmidt et al. (1997) propose NB5-4 produces 5-9 thoracic neurons or 3-4 abdominal motorneurons with ipsilateral targets. Schmid et al. (1999), also use DiI with en-GFP, but find 2-3 large cells that match descriptions of CCAP/CAP+ neurosecretory cells, along with abdomen-specific interneurons. Also, Schmid et al. (1999) state that NB5-4 delaminates during S5, whilst Schmidt et al. (1997) find that delamination occurs over the period of S3/4 to S5, most frequently at S4, and as such we have chosen to define NB5-4 as a stage 4 neuroblast. fly_anatomy.ontology neuroblast NB5-4 lineage NB5-4 neuroblast segmentally-repeated neuroblast