Table 2.

List of model parameters tuned with a brute-force search approach.

Parameter name	Value	Description
Recurrent connectivity radius	8	Radius of the inhibitory recurrent connectivity for each grid cell in the CAN
Recurrent connectivity shift	2	Shift in each of the four spatial directions of the recurrent connectivity of the CAN
Recurrent synaptic weight	−0.2	Synaptic weight of all recurrent connections between grid cells
Grid network baseline current (Ib)	2.0 mA	Excitatory current injected at every iteration in each grid cell
Velocity-dependent current gain (γ)	0.02	Gain that controls the amount of velocity-dependent currents injected in each grid cell
Plasticity time constant (τ)	10000 s	Time constant that controls the weight change rate of a sensory synapse
Coactivation threshold (αth)	0.05	Minimum level of coactivation necessary to induce a plastic change in a sensory synapse
Sensory current gain (k)	0.05	Gain that controls the amount of sensory currents injected in each grid cell
Maximum sensory synaptic weight	0.5	Maximum allowable weight for a sensory synapse