LUA is a set of two interneurons with cell bodies situated in the lumbar ganglia. Anteriorly directed processes leave the cell bodies and enter the pre-anal ganglion via the lumbar commissures (e). The processes of LUA run in the ventral regions of the neuropile of the pre-anal ganglion and terminate at the anterior end of the ganglion. LUA is quite synaptically active; its main postsynaptic partners are AVA (a, b, c) and AVD (a). There are also a few synapses to PVC (b) and AVJ (c). LUA receives some synaptic input from AVA (a) and possibly AVD. There are distinctive gap junctions between LUA and PLM in the lumbar commissures (d) and possibly a gap junction to A VA in the pre-anal ganglion. Magnifications : (a-d) x 25500.
Web adaptation, Thomas Boulin, for Wormatlas, 2001, 2002