part of innervates adult brain adult lateral horn primary neurite tract adult posterior ventral primary neurite tract 4 2020-04-29T12:00:00Z VFB:FBbt_00049291 adult PV4 primary neurite tract PDL16 PDL08 FBbt:00049291 fly_anatomy.ontology Primary neurite tract of the posterior ventral (PV) adult brain in the fourth clockwise position (from posterior perspective), from ventrolateral to dorsal to ventromedial, of PV tracts that enter the lateral horn (Frechter et al., 2019). Lateral horn neurons that enter the neuropil via this tract are predominantly local neurons (Frechter et al., 2019). It contains the primary neurites of LHp1 (BLP4) lineage neurons and SLPp&v1 (DPLp2) posterior hemilineage neurons (Schlegel et al., 2021).