Model symbols and parameters
| Description (value) | Symbol |
|---|---|
| Tortuosity of the running trajectory (1 radian) | σθ |
| Spatial location/running speed/running direction and at time t | |
| Long-term mean of the speed (30 cm/s) | v |
| Time step of the running trajectory (10 ms) | |
| Duration of the training/testing running trajectory (3600/1200 s) | |
| Spatial location in the environment | r |
| Spatiotemporal response at spatial location r at time t | |
| Spatial receptive field | |
| Amplitude/center/radius of the spatial receptive field | αc/ |
| Phase modulation at spatial location r at time t | |
| Level of phase modulation (uniformly sample from [0.8 1.2]) | kϕ |
| Frequency of the theta rhythm (10 Hz) | F |
| Firing phase at location r | |
| Entry phase of phase precession (uniformly sampled from [300° 340°]) | ϕ0 |
| Phase change of phase precession (uniformly sampled from [300° 340°]) | Δϕ |
| Projected center/radius of the spatial receptive field onto running direction | |
| Fitted spatial receptive fields of modelled hippocampal cells | |
| Amplitude/center/radius of the fitted spatial receptive field | |
| Fitted level of phase modulation | |
| Fitted frequency of theta rhythm | |
| Fitted phase of the temporal response | |
| Membrane time constant of modelled hippocampal cells (10 ms) | τ |
| Membrane potentials of modelled hippocampal cells | u |
| Firing rates of modelled hippocampal cells | s |
| Firing rates of EC input cells | I |
| Excitatory connection: EC input cells to modelled hippocampal cells | A |
| Firing threshold of modelled hippocampal cells (0.3) | β |
| Learning rate (0.01) | η |
| Time step of computing modelled hippocampal cells by Equation 7 (0.2 ms) | |
| Number of modelled hippocampal cells in scenarios 1, 2, and 3 (100) | |
| Number of MEC spatiotemporal grid cells in scenarios 1, 2, and 3 (900) | |
| Number of EC weakly spatial cells in scenarios 2 and 3 (400) |