Tm20 FBbt_00003808
Tm20
ID: FBbt_00003808
Transmedullary neuron that has dendritic arborization in medulla layers M1-M3, as well as presynaptic sites in M8 (Fischbach and Dittrich, 1989; Gao et al., 2008. In the medulla, it spans just one column (Kind et al., 2021, and receives input from lamina monopolar neuron L3 (Takemura et al., 2013 and an R8 photoreceptor (Kind et al., 2021. Its axon follows the anterior edge of its cognate medulla column (Ting et al., 2014, then crosses the second optic chiasma and projects to lobula layer 5 (Fischbach and Dittrich, 1989; Gao et al., 2008. It provides input to the lobula intrinsic neuron Li4 via many synapses (Lin et al., 2016. It is a cholinergic neuron (Gao et al., 2008. There is usually one of these cells per optic column (Nern et al., 2025. (Gao et al., 2008, Fischbach and Dittrich, 1989, Takemura et al., 2013, Lin et al., 2016, Kind et al., 2021, Ting et al., 2014)
Connectivity in the medulla based on EM (Takemura et al., 2013; Kind et al., 2021. Connectivity in the lobula was assessed by GRASP and double-labeling EM (Lin et al., 2016. Neurotransmitter was assessed using a cha-GAL4DBD driver (Gao et al., 2008.
Open in VFB 3D Browser →Classification
Relationships
- develops from: immature transmedullary neuron Tm20
- receives synaptic input from neuron: lamina monopolar neuron L3, photoreceptor cell R8
- receives synaptic input in region: medulla layer M1, medulla layer M2, medulla layer M3
- sends synaptic output to cell: lobula intrinsic neuron Li4
- sends synaptic output to region: lobula layer 5, medulla layer M8
Alternative Names
| Synonym | Scope | Reference |
|---|---|---|
| Tm20 | related synonym | Berg et al., 2025, Bates et al., 2025, Schlegel et al., 2024, name_in_male-cns, Nern et al., 2025 |
| Tm20 | exact synonym | Özel et al., 2021 |
Cross References
- Tm20 on FlyBrain NeuronDB (10145)
Downloads
Image files aligned to Tm20_R (MaleCNS:126128):
Image files aligned to Tm20_R (MaleCNS:91863):
Image files aligned to Tm20_L (MaleCNS:154777):
Image files aligned to Tm20_R (MaleCNS:105137):
Image files aligned to Tm20:
Image files aligned to Tm20_R (JRC_OpticLobe:88485):
Image files aligned to Tm20_R (JRC_OpticLobe:92204):
Image files aligned to Tm20_R (JRC_OpticLobe:104509):
Image files aligned to Tm20_R (JRC_OpticLobe:93032):
Image files aligned to Tm20_L (MaleCNS:154777):