AIN is a set of two interneurons with cell bodies situated in the
lateral ganglia. Processes
project anteriorly and enter the nerve ring sub-dorsally. They run
round the ring to the contralateral side on the outside surface and
then enter the ventral cord, eventually petering
out in the region of the ventral ganglion. The main synaptic output
is to AFD (a, d), BAG
(b), RIB (c), and ASE (a). The cephalic sheath cells may also be
receiving synaptic input from
AIN at dyadic synapses (b). AIN has no significant synaptic inputs
but has gap junctions with
ASG, AUA (*d) and itself.
Magnifications: (a) x 25500, (b-d) x 12750.
Web adaptation, Thomas Boulin,
for Wormatlas, 2001, 2002