FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term wing axillary muscle I2 motor neuron ID (Ontology) FBbt:00048109 (Fly Anatomy)
Definition Motor neuron that innervates the muscle of first axillary 56 (I2), ipsilaterally (Ehrhardt et al., 2023). Its soma is found in the ventral mesothoracic neuromere (Ehrhardt et al., 2023). It has dense arbors in the ipsilateral anterior dorsal mesothoracic neuromere, including the wing neuropil, with some fibers extending slightly into the contralateral hemisphere (O'Sullivan et al., 2018; Ehrhardt et al., 2023). In the male, it plays a role in courtship song generation (O'Sullivan et al., 2018).[ FlyBase:FBrf0240039 ]
Also Known As "i2 MN" ; "I2_MN"
Comment O'Sullivan et al. (2018) say it is specific for pulse song, Ehrhardt et al. (2023) say sine song.
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VFB:FBbt_00048109
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 wing axillary muscle I2 motor neuron (all annotations which use CV term, excluding "NOT" statements)       1
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thoracic neuron
 |__mesothoracic neuron________________
flight control muscle motor neuron     |
 |__direct flight muscle motor neuron__|
                                       wing axillary muscle I2 motor neuron  1 rec.
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Is a mesothoracic neuron
direct flight muscle motor neuron
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VFB:FBbt_00048109