Tm33 [FBbt_00053515]

Transmedullary neuron that has postsynapses in medulla layers M6 and M7-M8, and pre- and post-synapses lobula layers 5A-5B, in around 5 columns of each (Nern et al., 2025). Its soma is found distal to the medulla (Nern et al., 2025). It is predicted to be cholinergic (Eckstein et al., 2024; Nern et al., 2025). There are around 110-140 of these cells on each side (Nern et al., 2025).

Tags:

Tm33

ID: FBbt_00053515

Adult Cholinergic Nervous system Visual system

Cell type identified in two sets of EM data (Matsliah et al., 2024; Nern et al., 2025) and at light level (Nern et al., 2025).

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## Classification

Relationships

receives synaptic input in region: lobula layer 5A, lobula layer 5B, medulla layer M6, medulla layer M8, medulla serpentine layer
sends synaptic output to region: lobula layer 5A, lobula layer 5B

Alternative Names

Synonym	Scope	Reference
Tm33	exact synonym	Berg et al., 2025
Tm37	exact synonym	Nern et al., 2025
Tm37	exact synonym	Bates et al., 2025
Tm33	exact synonym	Nern et al., 2025
Tm33	exact synonym
Tm37	exact synonym	Schlegel et al., 2024

List all available images of Tm33 (686 total)

Thumbnail	Name	Tags
	Tm33_L (MaleCNS:132507)	Nervous_system, Visual_system, Adult, Cholinergic
	Tm33_L (MaleCNS:142140)	Nervous_system, Visual_system, Adult, Cholinergic
	Tm33_L (MaleCNS:142140)	Nervous_system, Visual_system, Adult, Cholinergic
	Tm33_R (MaleCNS:65783)	Nervous_system, Visual_system, Adult, Cholinergic
	Tm33_R (MaleCNS:65783)	Nervous_system, Visual_system, Adult, Cholinergic