Morphological description: | Thoracic relay interneuron (TI) has been found that arborizes profusely in a number of antennal glomeruli, i.e., in VA3, DL1/DA3, and in the VP1-3 region. These arborizations, originate from a stout process that leaves the antennal lobe through the AST (antenno-suboesophageal tract). Shortly behind the lobe, the process sends off a very long fiber towards the cell body, which is located in the antenno-dorsal cortex of the lobe, near the midline. The main process divides once more. One branch extends into the posterior brain and establishes terminal arborizations just behind the great commissure; the other branches project thorough the SOG and neck connective into the thoracic ganglion. Its thoracic targets are not known. |