has characteristic has soma location fasciculates with has synaptic IO in region sends synaptic output to cell mesothoracic neuron muscle cell of wing basalar muscle b2 adult anterior dorsal mesothoracic nerve direct flight muscle motor neuron wing basalar muscle b2 motor neuron Motor neuron that innervates the basalar muscle 51 (b2), ipsilaterally (Trimarchi and Schneiderman, 1994). It has a roughly spherical soma, located ventral to the root of the posterior dorsal mesothoracic nerve (Trimarchi and Schneiderman, 1994). Its axon exits the ventral nerve cord in the anterior dorsal mesothoracic nerve (Trimarchi and Schneiderman, 1994). Within the ventral nerve cord, one branch projects medially and arborizes in the anterior and medial wing neuropil, without crossing of the midline (Trimarchi and Schneiderman, 1994; Ehrhardt et al., 2023). A group of projections also extends posteriorly, arborizing in the dorsal metathoracic (haltere) nerve root and the dorsal mesothoracic leg neuropil (Trimarchi and Schneiderman, 1994). Other branches reach dorsal and lateral parts of the ipsilateral wing neuropil (Trimarchi and Schneiderman, 1994). FBbt:00004068 b2_MN b2 MN VFB:FBbt_00004068 b2mn fly_anatomy.ontology b2_MN wing neuropil adult T2 leg neuropil adult dorsal metathoracic nerve root cell body rind of adult mesothoracic neuromere unilateral