FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term larval mCSI neuron ID (Ontology) FBbt:00048370 (Fly Anatomy)
Definition Segmentally-repeated interneuron of the larval abdominal neuromeres that receives input from class IV dendritic arborizing (da) neurons (Yoshino et al., 2017). There is one bilateral pair of these cells per abdominal neuromere with cell bodies in a ventral medial position (Yoshino et al., 2017). They extend dendrites along the axons of class IV da neurons across multiple segments (predominantly ipsilaterally) in the ventral part of the neuropil and their axons reach the dorsal part of the neuropil (Yoshino et al., 2017). They are involved in the induction of rolling behavior in response to the activation of class IV da neurons (Yoshino et al., 2017).[ FlyBase:FBrf0236440 ]
Also Known As "larval medial cluster C4 da second order interneuron" ; "larval medial cluster class IV dendritic arborizing second-order interneuron"
Comment Synapsing determined by GRASP; distinct from Basin and Goro neurons (Yoshino et al., 2017). Supplement of Mark et al. (2021) - FBrf0249021 says these may be the A02m or A02n neurons.
Links to External Ontologies
VFB:FBbt_00048370
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interneuron
 |__larval interneuron_________
 |__primary interneuron________|
sensory system neuron          |
 |__nociceptive system neuron__|
primary neuron                 |
 |__primary interneuron________|
larval CNS neuron              |
 |__larval interneuron_________|
                               larval mCSI neuron
                                |__larval abdominal 1 mCSI neuron
                                |__larval abdominal 2 mCSI neuron
                                |__larval abdominal 3 mCSI neuron
                                |__larval abdominal 4 mCSI neuron
                                |__larval abdominal 5 mCSI neuron
                                |__larval abdominal 6 mCSI neuron
                                |__larval abdominal 7 mCSI neuron
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Is a nociceptive system neuron
larval interneuron
primary interneuron
Part of larval ventral nerve cord
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Synonyms
  • "larval medial cluster C4 da second order interneuron" EXACT[ FlyBase:FBrf0236440 ]
    "larval medial cluster class IV dendritic arborizing second-order interneuron" EXACT[ FlyBase:FBrf0236440 ]
Secondary IDs
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VFB:FBbt_00048370