The Mind of 
	a Worm

Members: AVKL, AVKR.

AVK is a pair of interneurons with cell bodies situated in the ventral ganglion behind the excretory duct. Anteriorly directed processes leave the cell bodies and run near the centre of the neuropile. They move ventrally as the nerve ring is approached and then run right round the ring near the outside surface, emerging on the contralateral side adjacent to the processes of their partners. At all times, in the regions of overlap, the processes of AVK run in close association with those of their contralateral partners. The processes travel down the length of the ventral cord running in the ventral regions of the process bundles on either side of the hypodermal ridge (c), eventually petering out in the pre-anal ganglion. The main synaptic output in the nerve ring is on the dorsal side and is directed to RIM (a, b), AVE (a) and SMD (b). Synapses are received mainly from DVB (*b), RMF (*e) and RIG (*f). AVK has gap junctions to several partners, namely itself, SMB (e), AQR (f), DVB, PVP (g), RIG, ADE (*d) and RIG. In the ventral cord there are a few small synapses to hypodermal cells (HDC) (d) and PDE (c). AVK receives synapses from PDE (*b) and PVM (*f). There are also some rather marginal gap junctions to PVP. Magnifications: (a, d, f, g) x 25500, (b, c, e) x 17000.

AVK ventral cord synapses
partners gap junctions synapses from synapses to and corecipients
HDC - - 5,AVM
PDE - 1 + 10 m 2, 2PDE
PVM - 7+4m 1
DVA - - 1
PVQ - - 1
PVP 5 - -

Web adaptation, Thomas Boulin, for Wormatlas, 2001, 2002