il3LN6 [FBbt_00047710]

il3LN6

ID: FBbt_00047710

Bilateral intrinsic neuron of the adult antennal lobe (AL) that has a cell body located in the lateral subesophageal zone, near the entry site of the labial nerve into the brain (Tanaka et al., 2012). There is one of these cells per hemisphere (Schlegel et al., 2021). It branches before reaching the AL and sends a fiber contralaterally to merge with the ipsilateral fiber of the contralateral cell of this type (Tanaka et al., 2012). It runs along the lateral side of the antenno-subesophageal tract, and joins it around the V glomerulus, before entering the AL (Tanaka et al., 2012). It projects to the AL hub, then arborizes in almost all glomeruli, forming glomerular arborizations (Tanaka et al., 2012). Its arbors are compartmentalized, so that it may be activated in a single glomerulus at a time (Taisz et al., 2023). It receives greater input from contralateral sensory neurons and provides inhibitory, GABAergic, input to projection neurons, increasing left-right contrast (Taisz et al., 2023).

Classified as an antennal lobe local neuron by Tanaka et al. (2012), despite cell body location, as no arborizations were observed outside of the antennal lobe. Mapped to il3LN6, as this is the only SEZ ALLN (Schlegel et al., 2021). Schlegel et al. (2021) mention similarity to larval keystone neurons, but not clear whether LN6 is the same cell type in the adult.