VO4-6 motor neuron obsolete A1-7 VO4-6 motor neuron 2013-01-18T03:48:44Z true FBbt:00110291 MN-VO4-6 neuron Motor neuron developing from the neuroblast NB7-1 lineage. It innervates the internal ventral oblique muscles 4, 5 and 6 of larval abdominal segments A1 to A7 (for VO6, only A2-A7). Its dendritic arborization occupies the medial domain of the ventral nerve cord neuropil. It exits the ventral nerve cord via the anterior root of the intersegmental nerve, fasciculating with the ISNd nerve branch and innervates the VO4, VO5 and VO6 muscles with type Ib boutons. U7,8 neuron MN15/16/17-Ib fly_anatomy.ontology Obsoleted. Since the only VO4, VO5 and VO6 muscles are in segments A1-7 (Bate, 1993), this class is a duplication of its parent (VO4-6 motor neuron). No associated records as at 2018-07-17.