FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
Help Close All Open All
General Information
Term larval A27j neuron ID (Ontology) FBbt:00111666 (Fly Anatomy)
Definition Neuron of the larval abdominal neuromere that is part of lineage 27. Its primary neurite extends from the dorsolateral edge of the ventral nerve cord medially, and then follows the midline ventrally. It receives substantial input from the ipsilateral A02a, A27e, contralateral A31k neuron, dorsal multidendritic neuron dda1, ddaD (Schneider-Mizell et al., 2016). It has strong outputs to the larval A27e (axo-axonic connection) and ipsilateral A1-7 dorsal motor neuron (Schneider-Mizell et al., 2016). It is a GABAergic neuron (Schneider-Mizell et al., 2016). It may be involved in avoidance behavior (Vogelstein et al., 2014).[ FlyBase:FBrf0224808 FlyBase:FBrf0231328 ]
Comment These neurons were identified in a EM reconstruction of a volume that includes the posterior half of abdominal segment 2 and abdominal segment 3, of a 12-24h old first instar larva. The number of connections was estimated from the publication figures. The number of input synapses was the following (number in brackets left/right where available; ipsi- and contralateral connections separated by comma): from A02a (15/10), A27e (15), A31k (10/8), dda1 (21), ddaD (21), ddaE (7). The number of output synapses was the following: to A27e (18), A1-7 dorsal motor neuron (12/25) (Schneider-Mizell et al., 2016). This is one of three types of neuron that express R25B07, it is not clear which is/are responsible for turning and crawling behavior (Vogelstein et al., 2014).
Links to External Ontologies
VFB:FBbt_00111666
Annotations
Records annotated with this term OR any of its CHILD TERMS
    Results list data from multiple species. Click on a button above and use the 'Filter by species' options on the resulting HitList to retrieve species-specific data.
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       3
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles Insertions Constructs
 larval A27j neuron (all annotations which use CV term, excluding "NOT" statements)       1      3      2
Spanning Tree (Parents/Children)
Only view relationship: 
larval neuron
 |__larval premotor neuron________
 |__larval GABAergic neuron_______|
neuron                            |
 |__abdominal neuron______________|
interneuron                       |
 |__larval interneuron____________|
 |__primary interneuron___________|
GABAergic neuron                  |
 |__larval GABAergic neuron_______|
sensory system neuron             |
 |__proprioceptive system neuron__|
primary neuron                    |
 |__primary interneuron___________|
premotor neuron                   |
 |__larval premotor neuron________|
larval CNS neuron                 |
 |__larval interneuron____________|
                                  larval A27j neuron  6 rec.
                                   |__larval abdominal 1 A27j neuron
Spanning Tree View Settings
Parents/Children
View Depth
Show hierarchy levels: for parents, for children
hide Relationships
Is a abdominal neuron
larval premotor neuron
larval interneuron
proprioceptive system neuron
primary interneuron
larval GABAergic neuron
Part of
hide Synonyms & Secondary IDs
Synonyms
Secondary IDs
hide External Crossreferences & Linkouts
VFB:FBbt_00111666