Table 3.
Connectivity of photoreceptors and HCs
| MHC |
BHC |
THC |
RHC |
|||||
|---|---|---|---|---|---|---|---|---|
| Contacted photoreceptors | Labeled dendrites | Contacted photoreceptors | Labeled dendrites | Contacted photoreceptors | Labeled dendrites | Contacted photoreceptors | Labeled dendrites | |
| L cone | 100% | 100% | 0% | 0% | 0% | 0% | 0% | 0% |
| M co ne | 100% | 50–80% | 100% | 40–70% | 0% | 0% | 0% | 0% |
| S cone | 0–50% | 0–10% | 100% | 50–80% | 100% | 50–70% | 0% | 0% |
| UV cone | 80–100% | 0–40% | 100% | 50–80% | 100% | 20–40% | 0–80% | 20–40% |
| Rod | 0% | 0% | 0% | 0% | 0% | 0% | 100% | 100% |
| Summary contacts | L, M, S, UV | M, S, UV | S, UV | UV, rods | ||||
Left column under each HC type shows estimate of % of cones contacted by each HC type, which is often 100% or 0%, but not always. Right column shows estimate of % of dendrites within a synaptic terminal originating from a certain type of photoreceptor.