Table 2.
Synaptic inputs to ON parasol cells. Cells 189 and 121 were located in the center of the connectome, and all of their dendrites and synaptic inputs were annotated. The wide-field amacrine cells presynaptic to cells 189 and 121 were annotated as completely as possible. Each had greater than 100 annotations and typically many more, and they were all rendered using the RenderApp function in SBFSEM-tools to confirm their identity. Other amacrine and bipolar cells were annotated sufficiently to determine that they were unlikely to be wide-field amacrine cells. The dendrites of the other four ON parasol cells were truncated when they reached the edge of the connectome, and the criteria to distinguish the two types of amacrine cells providing their input were more subjective. Nevertheless, the results were very similar, and the two sets of data were analyzed together.
| ON parasol cell | Bipolar cell inputs | Amacrine cell inputs | Total | |
|---|---|---|---|---|
| Wide-field | Other | |||
| 189 | 126 | 88 | 426 | 640 |
| 20% | 14% | 66% | ||
| 121 | 149 | 117 | 342 | 608 |
| 25% | 19% | 56% | ||
| 207 | 159 | 96 | 269 | 524 |
| 30% | 18% | 51% | ||
| 2234 | 98 | 69 | 284 | 451 |
| 22% | 15% | 63% | ||
| 5 | 28 | 69 | 214 | 311 |
| 9% | 22% | 69% | ||
| 126 | 39 | 47 | 198 | 284 |
| 14% | 16% | 70% | ||
| Total | 599 | 486 | 1733 | 2818 |
| 21% | 17% | 62% | ||