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PVP is a pair of neurons with cell bodies situated in the pre-anal ganglion. Processes project
anteriorly from the cell bodies, cross over (j), and then run up the ventral cord on either side
of the hypodermal ridge. The processes of PVP then enter the nerve ring and run round either
side of it, in the middle of the neuropile, until they meet a:nd terminate with a gap junction
and vesicle-filled swellings on the dorsal mid-line (g). The processes in the ring seem to be
closely associated with AVB; they also vary considerably in diameter. In the nerve ring, the
main synaptic output is to AVB (a, d), PVC (a), RIG (b), AVA (c), AVH (c) and there is
some synaptic input from RIF (*c) and AVH. In the ventral cord, there are a few synapses
onto the hypodermis (f) and AVL (e); there are many gap junctions to AQR and DVC (*d)
and a few to PQR (*h), PHA (*d), AVK and VDn (h).
Magnifications: (a, b, d) x 25500, (c, e, f, h) x 17000, (g) x 12750.
PVP ventral cord synapses
partners |
gap junctions |
synapses from |
synapses to and corecipients |
AVL |
- |
- |
1, PVQ, DVC, DD2 |
HDC |
- |
- |
3 |
DVC |
12 |
- |
1,AVL |
PVQ |
- |
- |
AVL |
PVC |
- |
- |
AVH |
AVH |
- |
- |
PVC |
DD2 |
- |
- |
AVL |
DVB |
- |
1+1m |
- |
VC3 |
- |
1m |
- |
AVG |
- |
1m |
- |
VC1 |
- |
1m |
- |
AVK |
5 |
- |
- |
PQR |
4 |
- |
- |
PHA |
3 |
- |
- |
AQR |
3 |
- |
- |
VD13 |
2 |
- |
- |
PVT |
1 |
- |
- |
PVP |
1 |
- |
- |
VD3 |
1 |
- |
- |
VD4 |
1 |
- |
- |
VD5 |
1 |
- |
- |
|
|
