Table 1.
Model variables
| S | Ventral striatal cell |
| IR | Reward input signal from lateral hypothalamus |
| WiS | CS-to-striatum synaptic weights |
| N+ | Above-baseline dopamine burst signal |
| N− | Below-baseline dopamine dip signal |
| Ii | CS input signal |
| P | PPTN cell activity |
| UP | PPTN cell afterhyperpolarization |
| xij | Striosomal metabotropic response |
| GijYij | Striosomal calcium concentration |
| Zij | CS input-to-striosomal synaptic weights |
| D | Dopamine cell activity |
| Baseline average dopamine signal |
| rj | Striosomal activity buildup rate parameter |
| M | Membrane potential driving integrate-and-fire |
| (IAF) spiking model | |
| ɛ | Gaussian noise input to IAF model |