Representing "What" and "When" in Working Memory: A Computational Neuroscience Approach Using Laplace Neural Manifolds

Neurons in working memory must exhibit conjunctive receptive fields for stimulus identity ("What") and elapsed time ("When") in order to maintain a compositional representation of recent events. The dynamics of such a representation depend critically on the choice of temporal basis functions, with logarithmically-spaced basis functions providing a good match to empirical data.