FB2026_03 , released September 17, 2026

CV Term Report

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General Information

Term

transmedullary neuron Tm5b

ID (Ontology)

FBbt:00110073 (Fly Anatomy)

Definition

Transmedullary Tm5 neuron that extends two or three vertical main dendritic branches in the medulla, spanning around five columns, from which branches spread laterally into layers M3, M6 and M8 (Kind et al., 2021). It receives most of its inner (R7/R8) photoreceptor input from the R7 photoreceptors of pale ommatidia (Kind et al., 2021). Its axon innervates lobula layer 5 (Kind et al., 2021). It provides input to the lobula intrinsic neuron Li4 via many synapses (Lin et al., 2016). It is a cholinergic neuron (Karuppudurai et al., 2014).[ FlyBase:FBrf0049410 FlyBase:FBrf0206213 FlyBase:FBrf0224070 FlyBase:FBrf0230403 FlyBase:FBrf0252485 ]

Also Known As

"Tm5b"

Comment

The neurotransmitter was assessed by immunohistochemistry (Karuppudurai et al., 2014). Connectivity in the lobula was assessed by GRASP and double-labeling EM (Lin et al., 2016). Photoreceptor input determined from EM (Kind et al., 2021).

Links to External Ontologies

VFB:FBbt_00110073

Annotations

Records annotated with this term OR any of its CHILD TERMS

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Direct annotations: records annotated with this exact term (child terms are NOT included)

Data Class	Field	Direct annotations
Insertions (FBti)	EXPRESSION_STAGE_TISSUE_POSITION

Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records

Full annotation statements	Relevant FlyBase reports
Full annotation statements	Alleles	Split System Combinations	Genes	Insertions	Constructs
transmedullary neuron Tm5b (all annotations which use CV term, excluding "NOT" statements)

Spanning Tree (Parents/Children)

transmedullary neuron
 |__transmedullary neuron Tm5______________
 |__wide field transmedullary neuron_______|
cholinergic neuron                         |
 |__adult cholinergic neuron_______________|
adult neuron                               |
 |__adult cholinergic neuron_______________|
secondary neuron                           |
 |__Notch ON hemilineage secondary neuron__|
Notch ON hemilineage neuron                |
 |__Notch ON hemilineage secondary neuron__|
optic lobe wide-field columnar neuron      |
 |__wide field transmedullary neuron_______|
                                           transmedullary neuron Tm5b  14 rec.

Spanning Tree View Settings
Parents/Children View Depth	Show hierarchy levels: for parents, for children
Relationships
Is a	transmedullary neuron Tm5 wide field transmedullary neuron Notch ON hemilineage secondary neuron adult cholinergic neuron
Develops from	immature transmedullary neuron Tm5b
Part of
Synonyms & Secondary IDs
Synonyms
	"Tm5b" EXACT VFB_SYMBOL[ FlyBase:FBrf0247762 ]
Secondary IDs

External Crossreferences & Linkouts
	VFB:FBbt_00110073