Long Memory Lifetimes Require Complex Synapses and Limited Sparseness

@article{Rubin2007LongML,
  title={Long Memory Lifetimes Require Complex Synapses and Limited Sparseness},
  author={Daniel Ben Dayan Rubin and Stefano Fusi},
  journal={Frontiers in Computational Neuroscience},
  year={2007},
  volume={1},
  pages={443 - 464}
}
Theoretical studies have shown that memories last longer if the neural representations are sparse, that is, when each neuron is selective for a small fraction of the events creating the memories. Sparseness reduces both the interference between stored memories and the number of synaptic modifications which are necessary for memory storage. Paradoxically, in cortical areas like the inferotemporal cortex, where presumably memory lifetimes are longer than in the medial temporal lobe, neural… CONTINUE READING
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