has synaptic IO in region fan-shaped body layer 5 adult fan-shaped body horizontal delta neuron pontine neuron P1a 2010-10-19T05:57:22Z See Figure 8 of Hanesch et al. (1989). Previously described as innervating the central layer (layer 3 of 6) (Hanesch et al., 1989; Young and Armstrong, 2010). Not clear which layer(s) this neuron innervates in the Wolff et al. (2015) 9-layer model. FBbt:00007527 VFB:FBbt_00007527 fly_anatomy.ontology Adult fan-shaped body horizontal delta neuron that arborizes in the central layer of the fan-shaped body (Hanesch et al., 1989; Young and Armstrong, 2010). Its soma is found at the same height in the posterior cell body rind (Hanesch et al., 1989). On entering the fan-shaped body, its projection bifurcates, one branch running anteriorly through one segment and arborizing there with spines, the other running along the caudal surface across the midline and sending blebbed endings into a segment that is separated from the ipsilateral segment by half the width of the fan-shaped body (Hanesch et al., 1989).