part of develops from presumptive embryonic/larval nervous system embryonic GW neuron Embryonic motor neuron precursor that develops from the first ganglion mother cell in the 7-3 lineage (GMC 7-3a) (Higashijima et al., 1996; Isshiki et al., 2001) and is the Notch ON descendent of this GMC (Lee and Lundell, 2007). One of these cells is produced in each thoracic, abdominal (A1-A8) and labial hemisegment (Higashijima et al., 1996; Rogulja-Ortmann et al., 2007; Rickert et al., 2018). It only develops into a larval neuron in segments S3-T2, in more posterior segments it undergoes programmed cell death (Rogulja-Ortmann et al., 2007; Rickert et al., 2018). fly_anatomy.ontology VFB:FBbt_00001586 embryonic 7-3M FBbt:00001586 According to Schmid et al. (1999) this motorneuron projects out of the posterior root of the ISN, joining the ISNd branch and innervates muscles VO4-6. However, this neuron was not identified by Landgraf et al. (1997). Found (and survives) in labial, but not maxillary or mandibular segments (Rickert et al., 2018 - FBrf0238045). developing embryonic structure ganglion mother cell GMC7-3a Notch ON hemilineage primary neuron NB7-3 lineage neuron immature primary neuron