has soma location develops from neuroblast MP2 vMP2 neuron Primary neuron that differentiates from neuroblast MP2 and projects anteriorly (Thomas et al., 1984). In the embryo it extends across segment boundaries and pioneers the vMP2 tract (Thomas et al., 1984; Schmid et al., 1999). VFB:FBbt_00001603 FBbt:00001603 MP2v fly_anatomy.ontology ventral nerve cord ectodermal derivative primary neuron CNS neuron