FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term adult protocerebral bridge 1 glomerulus-fan-shaped body-lateral accessory lobe neuron ID (Ontology) FBbt:00003635 (Fly Anatomy)
Definition Adult central complex neuron that connects a glomerulus of the protocerebral bridge (PB) to a column of the fan-shaped body (FB) and then exits the FB laterally to arborize in the lateral accessory lobe (Hanesch et al., 1989; Lin et al., 2013; Wolff et al., 2015; Hulse et al., 2021). Dendritic arborizations are found throughout the targeted PB glomerulus, but in some cases may extend into neighboring glomeruli (Wolff et al., 2015; Hulse et al., 2021). Arbors in the FB are mainly postsynaptic or mixed and arbors outside of the PB and FB are mainly presynaptic for most of these cell types (Hulse et al., 2021). These neurons follow an approximate nine-column organization in the fan-shaped body (Hulse et al., 2021).[ FlyBase:FBrf0049409 FlyBase:FBrf0221742 ]
Also Known As "pb-fb-idfp neuron" ; "pb-fb-vbo neuron" ; "PFI neuron"
Comment The specific 'horizontal fiber system neurons' described by Hanesch et al. (1989) probably correspond to PFR (protocerebral bridge-fan-shaped body-round body) type a neurons (Wolff et al., 2015). Lin et al. (2013) consider HFS to be equivalent to their PFI neurons - any neuron connecting PB, FB and IDFP (lateral accessory lobe/crepine).
Links to External Ontologies
VFB:FBbt_00003635
Annotations
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Data Class Field Records
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       1
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 adult protocerebral bridge 1 glomerulus-fan-shaped body-lateral accessory lobe neuron (all annotations which use CV term, excluding "NOT" statements)       1
Spanning Tree (Parents/Children)
Only view relationship: 
small field neuron of the central complex
 |__fan-shaped body extrinsic columnar neuron__
fan-shaped body columnar neuron                |
 |__fan-shaped body extrinsic columnar neuron__|
input/output neuron                            |
 |__fan-shaped body extrinsic columnar neuron__|
CNS neuron                                     |
 |__supraesophageal ganglion neuron____________|
                                               adult protocerebral bridge 1 glomerulus-fan-shaped body-lateral accessory lobe neuron  61 rec.
                                                |__adult protocerebral bridge 1 glomerulus-fan-shaped body layers 4 and 5-bilateral lateral accessory lobe neuron
                                                |   |__adult protocerebral bridge glomerulus 1-fan-shaped body layers 4 and 5-bilateral lateral accessory lobe neuron
                                                |   |__adult protocerebral bridge glomerulus 2-fan-shaped body layers 4 and 5-bilateral lateral accessory lobe neuron
                                                |   |__adult protocerebral bridge glomerulus 3-fan-shaped body layers 4 and 5-bilateral lateral accessory lobe neuron
                                                |   |__adult protocerebral bridge glomerulus 4-fan-shaped body layers 4 and 5-bilateral lateral accessory lobe neuron
                                                |   |__adult protocerebral bridge glomerulus 5-fan-shaped body layers 4 and 5-bilateral lateral accessory lobe neuron
                                                |__adult protocerebral bridge 1 glomerulus-fan-shaped body layers 4 and 5-unilateral lateral accessory lobe neuron
                                                |   |__adult protocerebral bridge glomerulus 1-fan-shaped body layers 4 and 5-unilateral lateral accessory lobe neuron(+)
                                                |   |__adult protocerebral bridge glomerulus 2-fan-shaped body layers 4 and 5-unilateral lateral accessory lobe neuron(+)
                                                |   |__adult protocerebral bridge glomerulus 3-fan-shaped body layers 4 and 5-unilateral lateral accessory lobe neuron
                                                |   |__adult protocerebral bridge glomerulus 4-fan-shaped body layers 4 and 5-unilateral lateral accessory lobe neuron
                                                |   |__adult protocerebral bridge glomerulus 5-fan-shaped body layers 4 and 5-unilateral lateral accessory lobe neuron
                                                |   |__adult protocerebral bridge glomerulus 6-fan-shaped body layers 4 and 5-unilateral lateral accessory lobe neuron
                                                |   |__adult protocerebral bridge glomerulus 7-fan-shaped body layers 4 and 5-unilateral lateral accessory lobe neuron
                                                |__adult protocerebral bridge 1 glomerulus-fan-shaped body-round body neuron 42 rec.
                                                |   |__adult protocerebral bridge 1 glomerulus-fan-shaped body-round body type a neuron(+) 36 rec.
                                                |   |__adult protocerebral bridge 1 glomerulus-fan-shaped body-round body type b neuron
                                                |__protocerebral bridge 1 glomerulus-fan-shaped body layer 2-lateral accessory lobe-crepine neuron 9 rec.
                                                |   |__protocerebral bridge glomerulus 1-fan-shaped body layer 2-lateral accessory lobe-crepine neuron
                                                |   |__protocerebral bridge glomerulus 2-fan-shaped body layer 2-lateral accessory lobe-crepine neuron
                                                |   |__protocerebral bridge glomerulus 3-fan-shaped body layer 2-lateral accessory lobe-crepine neuron
                                                |   |__protocerebral bridge glomerulus 4-fan-shaped body layer 2-lateral accessory lobe-crepine neuron
                                                |   |__protocerebral bridge glomerulus 5-fan-shaped body layer 2-lateral accessory lobe-crepine neuron
                                                |   |__protocerebral bridge glomerulus 6-fan-shaped body layer 2-lateral accessory lobe-crepine neuron
                                                |   |__protocerebral bridge glomerulus 7-fan-shaped body layer 2-lateral accessory lobe-crepine neuron
                                                |__protocerebral bridge 1 glomerulus-fan-shaped body-ventral gall surround neuron 10 rec.
                                                    |__protocerebral bridge glomerulus 1-fan-shaped body-ventral gall surround neuron
                                                    |__protocerebral bridge glomerulus 2-fan-shaped body-ventral gall surround neuron
                                                    |__protocerebral bridge glomerulus 3-fan-shaped body-ventral gall surround neuron
                                                    |__protocerebral bridge glomerulus 4-fan-shaped body-ventral gall surround neuron
                                                    |__protocerebral bridge glomerulus 5-fan-shaped body-ventral gall surround neuron
                                                    |__protocerebral bridge glomerulus 6-fan-shaped body-ventral gall surround neuron
                                                    |__protocerebral bridge glomerulus 7-fan-shaped body-ventral gall surround neuron
                                                    |__protocerebral bridge glomerulus 8-fan-shaped body-contralateral ventral gall surround neuron
                                                    |__protocerebral bridge glomerulus 8-fan-shaped body-ipsilateral ventral gall surround neuron
                                                    |__protocerebral bridge glomerulus 9-fan-shaped body-ventral gall surround neuron
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Is a supraesophageal ganglion neuron
fan-shaped body extrinsic columnar neuron
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FlyBrain_NDB:10254
VFB:FBbt_00003635