Figure 2.

Morphology of the two pairs of N_CCAP interneurons (IN_brain-1/-2) in the brain of 3rd instar larvae. (A1) The IN_brain-1 shows a large-field projection in the ipsilateral dmp and dlp, and a smaller arborizations in the contralateral dmp (maximum projection). The same neuron was reconstructed and is shown from dorsal (A2) and posterior (A3). (B) The pair of IN_brain-1 neurons (maximum projection). The arborizations on the ipsi- and contralateral sides are overlapping. The arborizations in the sog (asterisk) are from a different neuron with soma in the sog. (C1) The IN_brain-2 arborizes in the ipsilateral dmp, and sends bilateral descending neurites along the DM tracts which are obscured in their posterior part by the maximum projection, but are visible in the reconstructions in (C2) (dorsal view) and (C3) (lateral view). The circular structure formed by the IN_brain-2 neurites is only visible in the lateral view as shown in another preparation in (D), which shows additional N_CCAP in the ventral ganglion (asterisks). Scale bars = 50 μm.