ADA is a set of two interneurons with cell bodies situated
laterally at the level of the second
bulb of the pharynx. Processes enter the neuropile of the
retro-vesicular ganglion via the deirid
commissures and run anteriorly into the nerve ring. They then run
round the nerve ring and
end in a gap junction to their contralateral partners (b). The
processes of ADA are rather small
and run near the centre of the neuropile of the ring, adjacent to the
processes of AVA, much
of the time. Synaptic endings are generally small and have large dark
vesicles (a). The main
synaptic output is to AVB (a, c), with a few synapses also being made
to AVJ (c), RIM, SMD
and RIP (a). There are gap junctions to itself (b), AVD (d), PVQ, ASH
and ADF.
Magnifications: (a-d) x 25500.
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