Correlation detection and resonance in neural systems with distributed noise sources

Phys Rev Lett. 2001 Apr 16;86(16):3662-5. doi: 10.1103/PhysRevLett.86.3662.


We investigated the resonance behavior in model neurons receiving a large number of random synaptic inputs, whose distributed nature permits one to introduce correlations between them and investigate its effect on cellular responsiveness. A change in the strength of this background led to enhanced responsiveness, consistent with stochastic resonance. Altering the correlation revealed a type of resonance behavior in which the neuron is sensitive to statistical properties rather than the strength of the noise. Remarkably, the neuron could detect weak correlations among the distributed inputs within millisecond time scales.

MeSH terms

  • Animals
  • Dendrites / physiology
  • Models, Neurological*
  • Neocortex / physiology*
  • Nerve Net / physiology
  • Neurons / physiology*
  • Stochastic Processes
  • Synapses / physiology
  • Synaptic Transmission / physiology