Limits on the memory storage capacity of bounded synapses. Export

@article{citeulike:1176143, abstract = {Memories maintained in patterns of synaptic connectivity are rapidly overwritten and destroyed by ongoing plasticity related to the storage of new memories. Short memory lifetimes arise from the bounds that must be imposed on synaptic efficacy in any realistic model. We explored whether memory performance can be improved by allowing synapses to traverse a large number of states before reaching their bounds, or by changing the way these bounds are imposed. In the case of hard bounds, memory lifetimes grow proportional to the square of the number of synaptic states, but only if potentiation and depression are precisely balanced. Improved performance can be obtained without fine tuning by imposing soft bounds, but this improvement is only linear with respect to the number of synaptic states. We explored several other possibilities and conclude that improving memory performance requires a more radical modification of the standard model of memory storage.}, address = {Center for Neurobiology and Behavior, Kolb Research Annex, Columbia University College of Physicians and Surgeons, 1051 Riverside Drive, New York, New York 10032-2695, USA.}, author = {Fusi, Stefano and Abbott, L F F.}, citeulike-article-id = {1176143}, citeulike-linkout-0 = {http://dx.doi.org/10.1038/nn1859}, citeulike-linkout-1 = {http://dx.doi.org/10.1038/nn1859}, citeulike-linkout-2 = {http://view.ncbi.nlm.nih.gov/pubmed/17351638}, citeulike-linkout-3 = {http://www.hubmed.org/display.cgi?uids=17351638}, day = {11}, doi = {10.1038/nn1859}, issn = {1097-6256}, journal = {Nat Neurosci}, keywords = {brain-anatomy, computational, hopfield, memory-storage, model, neuroscience, synaptic-plasticity}, month = {March}, posted-at = {2009-05-02 04:09:17}, priority = {2}, title = {Limits on the memory storage capacity of bounded synapses.}, url = {http://dx.doi.org/10.1038/nn1859}, year = {2007} }

TY - JOUR ID - citeulike:1176143 L3 - citeulike-article-id:1176143 N2 - Memories maintained in patterns of synaptic connectivity are rapidly overwritten and destroyed by ongoing plasticity related to the storage of new memories. Short memory lifetimes arise from the bounds that must be imposed on synaptic efficacy in any realistic model. We explored whether memory performance can be improved by allowing synapses to traverse a large number of states before reaching their bounds, or by changing the way these bounds are imposed. In the case of hard bounds, memory lifetimes grow proportional to the square of the number of synaptic states, but only if potentiation and depression are precisely balanced. Improved performance can be obtained without fine tuning by imposing soft bounds, but this improvement is only linear with respect to the number of synaptic states. We explored several other possibilities and conclude that improving memory performance requires a more radical modification of the standard model of memory storage. JF - Nat Neurosci SN - 1097-6256 AD - Center for Neurobiology and Behavior, Kolb Research Annex, Columbia University College of Physicians and Surgeons, 1051 Riverside Drive, New York, New York 10032-2695, USA. TI - Limits on the memory storage capacity of bounded synapses. KW - brain-anatomy KW - computational KW - hopfield KW - memory-storage KW - model KW - neuroscience KW - synaptic-plasticity AU - Fusi, Stefano AU - Abbott, L F PY - 2007/03/11/ UR - http://dx.doi.org/10.1038/nn1859 ER -