Coding and transmission of information by neural ensembles

  title={Coding and transmission of information by neural ensembles},
  author={Bruno B. Averbeck and Daeyeol Lee},
  journal={Trends in Neurosciences},

Neural synchrony in cortical networks: mechanisms and implications for neural information processing and coding

This article proposes that synchronous firing of distributed neurons is a natural consequence of spike-timing-dependent plasticity (STDP) that associates cells repetitively receiving temporally coherent input and proposes the “synchrony through synaptic plasticity” hypothesis, which makes several predictions.

Neural correlations, population coding and computation

This work reviews studies that address the interaction between neuronal noise and population codes, and discusses their implications for population coding in general.

The Languages of Neurons: An Analysis of Coding Mechanisms by Which Neurons Communicate, Learn and Store Information

Evidence is provided that individual neurons possess language, and that the basic unit for communication consists of two neurons and their entire field of interacting dendritic and synaptic connections, which suggests that this unidirectional inter-neuronal language-based word translation step is of utmost importance to brain function.

Adaptive coding of visual information in neural populations

Brief adaptation to a stimulus of fixed structure reorganizes the distribution of correlations across the entire network by selectively reducing their mean and variability, suggesting that brief adaptation improves the accuracy of population coding to optimize neuronal performance during natural viewing.

Neural Population Codes

It is argued that the combinatorial number of potential activity patterns and correlations implies that understanding the code of large populations must rely on identifying simplifying principles of the design of neural codes, and an information theory–based framework is presented for assessing the role and impact of correlations and noise between cells and how it shapes the nature of the code.

The Geometry of Information Coding in Correlated Neural Populations.

This review provides an overview of the theoretical developments on the influence of noise correlations on the properties of neural coding and emphasizes the relevance of the fine structure of noise correlation.

Spatio-temporal correlations and visual signalling in a complete neuronal population

The functional significance of correlated firing in a complete population of macaque parasol retinal ganglion cells is analysed using a model of multi-neuron spike responses, and a model-based approach reveals the role of correlated activity in the retinal coding of visual stimuli, and provides a general framework for understanding the importance of correlation activity in populations of neurons.

A new perspective on the organization of neuronal activity in neocortex and its implications for neuronal information processing and coding

A new hypothesis explains the directed synchronization of distributed neuronal signals through the coordinated adjustment of response latencies of a group of cells in consequence of synaptic plasticity.

Redundant information encoding in primary motor cortex during motor tasks

It is suggested that redundancy in information encoding is highly prevalent in the motor cortex and may contribute to proficient motor control in macaque monkeys performing a center-out reaching task.

Encoding by Synchronization in the Primate Striatum

It is suggested that the level of synchronization of the neuronal activity and its temporal dynamics differentiate the striatal territories and may thus account for the different roles that striatal domains play in behavioral control.



Correlations and the encoding of information in the nervous system

This analysis provides fundamental constraints upon the nature of information coding, showing that over short time–scales, correlations cannot dominate information representation, and that stimulus–independent correlations may lead to synergy, but that only certain combinations of the different sources of correlation result in significant synergy.

Coding of visual information by precisely correlated spikes in the lateral geniculate nucleus

An information-theoretic analysis is used to examine the role of correlations among neurons in the lateral geniculate nucleus with overlapping receptive fields in visual coding and finds that precise temporal correlation could be used as an additional information channel from thalamus to visual cortex.

Information theory and neural coding

This approach shows that dynamic stimuli can be encoded efficiently by single neurons and that each spike contributes to information transmission, and argues that the data obtained so far do not suggest a temporal code, in which the placement of spikes relative to each other yields additional information.

Correlated discharges among putative pyramidal neurons and interneurons in the primate prefrontal cortex.

The findings suggest that nearby inhibitory neurons are more tightly synchronized than excitatory ones and account for much of the correlated discharges commonly observed in undifferentiated cortical networks.

How independent are the messages carried by adjacent inferior temporal cortical neurons?

  • TJ GawneBJ Richmond
  • Biology
    The Journal of neuroscience : the official journal of the Society for Neuroscience
  • 1993
The severe impact of correlated noise and information redundancy leads us to propose that the processing carried out by these neurons evolved both to provide a rich description of many stimulus properties and simultaneously to minimize the redundancy in a local group of neurons.

Excess synchrony in motor cortical neurons provides redundant direction information with that from coarse temporal measures.

This model supports the information theoretic analysis that the synchronous spikes do not provide directional information beyond that available from the firing rates of the same pool of directionally tuned MI neurons and leaves open the possibility that excess synchrony carries other forms of information or serves other roles in cortical information processing.

Attention modulates synchronized neuronal firing in primate somatosensory cortex

Investigating the synchronous firing of pairs of neurons in the secondary somatosensory cortex of three monkeys trained to switch attention between a visual task and a tactile discrimination task found that most neuron pairs in SII cortex fired synchronously and, furthermore, that the degree of synchrony was affected by the monkey's attentional state.

A network of fast-spiking cells in the neocortex connected by electrical synapses

It is shown that communication through electrical synapses allows excitatory signalling among inhibitory cells and promotes their synchronous spiking, and establishes a network of fast-spiking cells in the neocortex which may play a key role in coordinating cortical activity.