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AVH is a pair of interneurons with cell bodies in the lateral ganglia. Processes from the cell
bodies enter the nerve ring sub-dorsally and cross over to the contralateral side. They then
travel ventrally round the ring, running near the middle of the neuropile, and leave it to enter
the ventral cord. The processes of AVH run in the dorsal regions of the cord and end in the
pre-anal ganglion. The chemical synapses made by AVH are rather small, with few synaptic
vesicles. The main synaptic outputs are to AVJ (c), PVP, SMB (b), ADF (a) and RIR (a)
in the nerve ring. In the ventral cord there are synapses to and from AVF (d, *c) as well as
gap junctions to AVF and also a few synapses from PHA.
Magnifications: (a) x 25500, (b-d) x 17000.
AVH ventral cord synapses
partners |
gap junctions |
synapses from |
synapses to and corecipients |
AVF |
8 |
3+5m |
2AVH, 2AVF, PVQ |
PVQ |
- |
- |
AVF, VD1 |
AVH |
- |
2m |
2AVF |
VD1 |
- |
- |
PVQ |
AVJ |
- |
1m |
AVB |
AVB |
- |
- |
AVJ |
PHB |
- |
- |
- |
PHA |
- |
3m |
- |
PVP |
- |
1m |
- |
AVA |
- |
lm |
- |
PHC |
- |
lm |
- |
VC4 |
- |
1m |
- |
|
