Table 1.
List of recurrent symbols
| Symbol | Description | Equation |
|---|---|---|
| U | Facilitation factor | 1 |
| τrec | Recovery time constant | 1 |
| τf | Facilitation time constant | 1 |
| r | Firing rate of a single synapse | 2 |
| PRR | Proportion of released resources | 2 |
| Q | Total PRR (integrated over a time interval) | 3 |
| Ts | Duration of the stimulus interval | 3 |
| N | Number of presynaptic neurons | 4 |
| G | Gain of any given distribution of presynaptic activity over the maximally distributed presynaptic activity (
) | 6 |
| OD | Optimal distribution of the presynaptic activity | 7 |
| s1, s2 | Synaptic type 1, synaptic type 2 | 12 |
| rbas | Individual basal firing rate | |
| rext | Individual increase in firing rate | |
| Individual increase in firing rate when 
| |
| ropt | Optimal individual increase in firing rate when Next = Nopt | |
| Rbas | Total population basal firing rate | |
| Rext | Total population increase in firing rate | |
| Xs | A s superscript indicates a quantity for a single synapse | |
| Xp | A p superscript indicates a quantity for a population of synapses | |
| Xbas | A bas subscript indicates a quantity for basal level activity | |
| Xext | A ext subscript indicates a quantity for extra activity | |
| A δ subscript indicates a quantity for the maximally distributed presynaptic activity (
) | |
| Xopt | A opt subscript indicates a quantity for the optimally distributed presynaptic activity (Next = Nopt) |