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Neural Network Storage and Capacity: Insights from Neocortex

Explore the intricate mechanisms of neural network storage capacity and organization in the neocortex through Hebb's and Stent's postulates. Discover how cells wire together through firing patterns and the role of NMDA receptors in synaptic plasticity and efficiency.

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Neural Network Storage and Capacity: Insights from Neocortex

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  1. Storage capacity: consider the neocortex ~20*10^9 cells, 20*10^13 synapses

  2. Hebb’s postulate “When an axon of cell A is near enough to excite cell B and repeatedly or persistently takes part in firing it, some growth process or metabolic change takes place in one or both cells such that A’s efficiency, as one of the cells firing B, is increased.” From the “Organization of Behavior” by D. O. Hebb (1949) Cells that fire toghether are wired together

  3. Stent’s postulate “When an axon of cell A repeatedly and persistently fails to excite the postsynaptic cell B while cell B is firing under the influence of other presynaptic axons, metabolic change takes place in one or both cells such that A’s efficiency, as one of the cells firing B, is decreased.” Cells that fire out of sinc lose their link

  4. NMDA receptor is the “coincidence detector”

  5. Rapid spine delivery and redistribution of AMPA receptors after synaptic NMDA receptor activation. By Shi et al. (1999) Science 284: 1811-1816.

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