Spike-based strategies for rapid processing

Neural Netw. Jul-Sep 2001;14(6-7):715-25. doi: 10.1016/s0893-6080(01)00083-1.

Abstract

Most experimental and theoretical studies of brain function assume that neurons transmit information as a rate code, but recent studies on the speed of visual processing impose temporal constraints that appear incompatible with such a coding scheme. Other coding schemes that use the pattern of spikes across a population a neurons may be much more efficient. For example, since strongly activated neurons tend to fire first, one can use the order of firing as a code. We argue that Rank Order Coding is not only very efficient, but also easy to implement in biological hardware: neurons can be made sensitive to the order of activation of their inputs by including a feed-forward shunting inhibition mechanism that progressively desensitizes the neuronal population during a wave of afferent activity. In such a case, maximum activation will only be produced when the afferent inputs are activated in the order of their synaptic weights.

Publication types

  • Review

MeSH terms

  • Action Potentials / physiology*
  • Animals
  • Central Nervous System / physiology*
  • Humans
  • Models, Neurological*
  • Nerve Net / physiology*
  • Neurons / physiology*
  • Perception / physiology
  • Signal Transduction / physiology*
  • Synaptic Transmission / physiology*
  • Time Factors