Fast dynamic organization without short-term synaptic plasticity: A new view on Hebb's dynamical assemblies
Hebb postulated cell assemblies as the basic computational elements for understanding cortical processing. He defined them as temporary associations of neurons that organize fast and flexibly into functional units, using correlation-based short-term synaptic plasticity. Based on the properties of spiking neurons, we implement dynamical assemblies that organize completely without synaptic plasticity. Instead, we find varying effective connection strengths that reflect the organizational process. We propose that this dynamic reorganization capabilities ocurring on a fast temporal scale may be a central element of cortical processing.
hebb dynamical assemblies spiking neurons pools grouping correlations coherence oscillatory activity