BDU is a set of two interneurons with cell bodies situated laterally in the anterior body (f). Single processes project anteriorly from each cell body and run adjacent to the excretory canal, until they enter the retro-vesicular ganglion via deirid commissures. The processes then run anteriorly on either side of the ventral hypodermal ridge until the nerve ring is reached. This they enter, running round near the inside surface of the neuropile in close association with the processes of PVN, finally meeting and terminating on the dorsal mid-line. The presynaptic regions of chemical synapses from BDU are generally rather small but have striking, darkly staining vesicles (a, b, c, d). The main synaptic output of BDU is to AVJ (a), PVN (c), ADE (b) and HSN (d). The main synaptic inputs are from ALM (*a), A VM (*b), HSN (*d) and PVN (*a). Magnifications: (a-d) x 25500.
|partners||gap junctions||synapses from||synapses to and corecipients|
|HSN||-||-||1, AVA, SAAD|
Web adaptation, Thomas Boulin, for Wormatlas, 2001, 2002