Projects / Memory & the hippocampus
Hippocampus models
A continuous-attractor grid-cell simulator and Vector-HaSH associative memory, extended with online Hebbian learning and metaplasticity tuned by evolutionary search.
Grid cells
A continuous attractor network (CAN) of grid cells driven by a simulated rat exploring a box, rendered to video.
Vector-HaSH
An implementation of Vector-HaSH, in which prestructured grid-like “spatial” scaffolds give the hippocampus a high-capacity associative and episodic memory.
Extension: learning online
The paper uses an exact pseudoinverse. Here, Hebbian learning with metaplasticity (plasticity of plasticity) memorizes patterns online, with its parameters found by an island-model CMA-ES.