fasciculates with synapsed_via_type_Ib_bouton_to sends synaptic output to cell muscle cell of A1-7 dorsal transverse muscle 1 larval NB3-2 intersegmental nerve anterior root primary motor neuron abdominal segment motor neuron larval abdominal intersegmental nerve motor neuron larval external muscle motor neuron larval anterior intersegmental nerve root of A1-7 larval A1-7-innervating ISN motor neuron larval DT1 motor neuron larval A1-7-innervating DT1 motor neuron 2013-01-18T02:47:33Z A1-7 MN-DT1 VFB:FBbt_00110278 FBbt:00110278 fly_anatomy.ontology Motor neuron developing from neuroblast NB3-2 lineage that innervates the dorsal transverse muscle 1 (DT1) of abdominal segments 1 to 7 (Landgraf et al., 1997). It exits the ventral nerve cord via the anterior intersegmental nerve root, fasciculates with the intersegmental nerve, and innervates the DT1 muscle with type Ib boutons (Landgraf et al., 1997; Hoang and Chiba, 2001). Although it innervates an external muscle, its soma is clustered with those of the internal muscle-innervating neurons in the segment anterior to the muscle it innervates (Landgraf et al., 2003). Its dendritic arborizations are found with those of other external muscle-innervating neurons, connected via a long posterior projection (Landgraf et al., 2003). A1-7 MN18-Ib