منابع مشابه
Homeostatic synaptic scaling in self-organizing maps
Various forms of the self-organizing map (SOM) have been proposed as models of cortical development [Choe Y., Miikkulainen R., (2004). Contour integration and segmentation with self-organized lateral connections. Biological Cybernetics, 90, 75-88; Kohonen T., (2001). Self-organizing maps (3rd ed.). Springer; Sirosh J., Miikkulainen R., (1997). Topographic receptive fields and patterned lateral ...
متن کاملA synaptic organizing principle for cortical neuronal groups.
Neuronal circuitry is often considered a clean slate that can be dynamically and arbitrarily molded by experience. However, when we investigated synaptic connectivity in groups of pyramidal neurons in the neocortex, we found that both connectivity and synaptic weights were surprisingly predictable. Synaptic weights follow very closely the number of connections in a group of neurons, saturating ...
متن کاملA self-organizing map with homeostatic synaptic scaling
Hebbian learning has been a staple of neural network models for many years. It is well known that the most straight-forward implementations of this popular learning rule lead to unconstrained weight growth. A newly discovered property of cortical neurons is that they try to maintain a preset average firing rate [5]. We use this property to control the Hebbian learning process in a self-organizi...
متن کاملDynamic Control of Synaptic Adhesion and Organizing Molecules in Synaptic Plasticity
Synapses play a critical role in establishing and maintaining neural circuits, permitting targeted information transfer throughout the brain. A large portfolio of synaptic adhesion/organizing molecules (SAMs) exists in the mammalian brain involved in synapse development and maintenance. SAMs bind protein partners, forming trans-complexes spanning the synaptic cleft or cis-complexes attached to ...
متن کاملRandom Walks, Arrangements, Cell Complexes, Greedoids, and Self-organizing Libraries
The starting point is the known fact that some much-studied random walks on permutations, such as the Tsetlin library, arise from walks on real hyperplane arrangements. This paper explores similar walks on complex hyperplane arrangements. This is achieved by involving certain cell complexes naturally associated with the arrangement. In a particular case this leads to walks on libraries with sev...
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ژورنال
عنوان ژورنال: Current Opinion in Neurobiology
سال: 2011
ISSN: 0959-4388
DOI: 10.1016/j.conb.2010.08.016