larval abdominal dorsal multidendritic neuron dda1 FBbt_00111650

larval abdominal dorsal multidendritic neuron dda1

ID: FBbt_00111650

Dendritic arborizing neuron whose cell body is located dorsal to the ddaB neuron in the abdominal segments. Its dendritic arborization projects relatively deep below the cuticle to trachea or muscles. The formation of this neuron depends on the expression of the amos gene (FBgn0003270). It outputs to the ipsilateral larval Jaam2 and contralateral Jaam3 neurons, A27j neuron, and ipsi- and contralateral A02b neuron. (Brewster et al., 2001, Grueber et al., 2003, Orgogozo and Grueber, 2005, Heckscher et al., 2015, Schneider-Mizell et al., 2016)

These neurons were identified in two EM reconstructions: one of the full CNS of a 6h old first instar larva, and another of abdominal segment 3 of a 12-24h old first instar larva (Heckscher et al., 2015; Schneider-Mizell et al., 2016. For Heckscher et al., 2015 only bilateral connections are reported. The number of identified output synapses in A1 was the following (number in brackets left/right): to Jaam2 (34/25), Jaam3 (35/40). It is still not known if the pattern of connections with Jaam neurons in A1 is replicated in the other abdominal segments (Heckscher et al., 2015. For Schneider-Mizell et al., 2016, the number of connections was estimated from the publication figures. The number of output synapses was the following (number in brackets left/right where available; ipsi- and contralateral connections separated by comma): to A27j (21), A02b (15, 15/15, 15) (Schneider-Mizell et al., 2016.