AWA is a set of two ciliated neurons that are associated with
the sheath cells of the amphid sensilla (figure 1). The cell bodies
of AWA are situated in the lateral ganglia and send processes
into the ventral cord via the amphid commissures. The processes run
anteriorly in the ventral cord near the ventral surface of the cord
and project into the nerve ring, where they run near the middle of the
neuropile. The processes of AWA meet and terminate at the
dorsal mid-line with a gap junction. The predominant synaptic output
is to AIZ (a); there are also some synapses to AFD (b), AIY (c) and ASE usually in dyadic combination with AIZ. A few of the synaptic vesicles are dark cored (a). There
are gap junctions to AIA (d). Magnifications: (a, d) x 25500,
(b, c) x 12750.
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