Table 3.
Numbers of cells in the left, right and centre of the CNS and PNS.
|
Left |
Centre |
Right |
|
|---|---|---|---|
Lens cells |
3 |
||
Pigment cells |
2 |
||
|
Total: Pigment and lens cells |
5 |
||
Coronet |
13* |
2 |
1 |
|
Photoreceptors |
37* |
||
Antenna neurons |
1 |
1 |
|
Photoreceptor tract interneurons |
3* |
||
Anterior BV neurons |
29 |
1 |
|
BV peripheral interneurons |
4 |
4 |
1 |
Bipolar neurons |
2 |
||
Anaxonal arborizing neurons |
1 |
2 |
|
Posterior BV peripheral interneurons |
2 |
1 |
1 |
|
Photoreceptor relay neurons |
6 |
||
|
Photoreceptor-peripheral relay neurons |
2 |
2 |
6 |
|
Photoreceptor-coronet relay neurons |
2 |
1 |
|
Antenna-coronet relay neuron |
1 |
||
|
Antenna relay neurons |
7 |
2 |
|
|
Peripheral relay neurons |
2 |
1 |
|
Relay interneurons |
5 |
||
|
Total: BV neurons |
72 |
14 |
57 |
Neck neurons |
1 |
1 |
|
|
Total: Neck neurons |
1 |
1 |
|
Ascending MG peripheral interneurons |
3 |
1 |
3 |
Descending decussating neurons |
1 |
1 |
|
MG interneurons |
3 |
3 |
|
|
Motor neurons |
5 |
5 |
|
|
Total: MG neurons |
12 |
1 |
12 |
Ascending contralateral inhibitory neurons (ACINs) |
2 |
1 |
|
Posterior MG interneurons |
2 |
||
Mid-tail neurons** |
2 |
2 |
|
|
Total: CNC neurons |
4 |
5 |
|
|
All CNS neurons |
88 |
15 |
75 |
|
Peripheral nervous system | |||
Bipolar tail neurons |
2 |
2 |
|
Peripheral neurons (RTENa) |
6 |
6 |
|
anterior ATENs |
2 |
2 |
|
posterior ATENs |
4 |
||
DCENs |
4 |
||
|
Total: PNS neurons |
8 |
6 |
14 |
Neurons of the left side of the nervous system outnumber those of the right, which in turn outnumber those of the centre. All CNS neurons include known neurons that lack synapses (*).
**Additional mid-tail neurons which lay beyond the analysed region of the EM series are excluded from the totals.