What resolves this contention: Static fine-tuned recurrent E/I bump attractor v…

What resolves this contention: Static fine-tuned recurrent E/I bump attractor vs. fast-Hebbian-plasticity model of working memory: the former requires precisely tuned recurrent weights, the latter argues that on-line synaptic plasticity is the mechanism. / To observe stable spontaneous and persistent activity, we find that recurrent synaptic excitation should be primarily mediated by NMDA receptors, and that overall recurrent synaptic interactions should be dominated by inhibition. / A computational model demonstrates a working memory function that is more resistant to distractors and network inhomogeneity compared to previous models, and that is also capable of storing multiple memories.