Table 1.
Discharge rates of individual SCN neurons during the subjective day and night when the animal was in darkness
| Animal number | Baseline (Hz) | Light response (Hz) | ||
|---|---|---|---|---|
| Day | Night | Day | Night | |
| 80b013 | 0.05 | 0.02 | 0.1 | 0.2 |
| 90b001 | 2.5 | 1.5 | 8 | 16 |
| 66a003 | 0.4 | 0.2 | 20 | 35 |
| 45a016 | 0.2 | 0.05 | 0.5 | 1 |
| 73b010 | 0.02 | 0.01 | ||
| 74b001 | 0.25 | 0.15 | ||
| U99b001 | 0.7 | 0.15 | ||
| U99a001 | 8 | 4 | ||
| U97a001 | 0.35 | 0.2 | ||
| Mean | 1.39 | 0.70 | 7.15 | 13.05 |
| Mean of ratio | 2.47:1 | 1:1.93 | ||
The ratio of discharges was calculated per neuron, before the mean was established. Of the nine single units, four appeared responsive to light pulses of 0.15 lux. Presented are the steady-state light response levels obtained during 6 min light presentations during the subjective day and night.