ALN and PLN are two sets of neurons with cell bodies situated in the
lumbar ganglion (e, f, g). All four send processes anteriorly, which
eventually enter the nerve ring; they also have posteriorly directed
processes that run into the tailspike. The processes of ALN run
laterally and become closely associated with those of ALM in the
anterior half of the animal (d). They then enter the nerve ring sub-dorsally and run ventrally round the ring for a short
distance. The processes from PLN are closely associated with those of PLM in the posterior
half of the animal, although the association is not as striking as that of ALN with ALM. The
processes of PLN join the ventral sub-lateral cords in the anterior of the animal and from there
enter the ventral cord via the amphidial commissures. The processes of PLN then enter the
nerve ring and run dorsally for a short distance. The main synaptic outputs of both ALN and
PLN are dyadic synapses to SMB and SAA (a, b) and a few synapses to SMD(c).
Magnifications: (a, b, d) x 25500, (c) x 12750.
Web adaptation, Thomas Boulin,
for Wormatlas, 2001, 2002
