Journal ArticleDOI
Primary cortical representation of sounds by the coordination of action-potential timing
Reads0
Chats0
TLDR
Cortical population coding based on relative spike timing can systematically signal stimulus features, it is topographically mapped, and it follows the stimulus time course even where mean firing rate does not.Abstract:
Cortical population coding could in principle rely on either the mean rate of neuronal action potentials, or the relative timing of action potentials, or both. When a single sensory stimulus drives many neurons to fire at elevated rates, the spikes of these neurons become tightly synchronized, which could be involved in 'binding' together individual firing-rate feature representations into a unified object percept. Here we demonstrate that the relative timing of cortical action potentials can signal stimulus features themselves, a function even more basic than feature grouping. Populations of neurons in the primary auditory cortex can coordinate the relative timing of their action potentials such that spikes occur closer together in time during continuous stimuli. In this way cortical neurons can signal stimuli even when their firing rates do not change. Population coding based on relative spike timing can systemically signal stimulus features, it is topographically mapped, and it follows the stimulus time course even where mean firing rate does not.read more
Citations
More filters
Book
Spiking Neuron Models: Single Neurons, Populations, Plasticity
TL;DR: A comparison of single and two-dimensional neuron models for spiking neuron models and models of Synaptic Plasticity shows that the former are superior to the latter, while the latter are better suited to population models.
Journal ArticleDOI
Synaptic depression and cortical gain control
TL;DR: Modeling work based on experimental measurements indicates that short-term depression of intracortical synapses provides a dynamic gain-control mechanism that allows equal percentage rate changes on rapidly and slowly firing afferents to produce equal postsynaptic responses.
Journal ArticleDOI
The principal features and mechanisms of dopamine modulation in the prefrontal cortex
TL;DR: Certain principles of DA mechanisms are identified by drawing on published, as well as unpublished data from PFC and other CNS sites to shed light on aspects of DA neuromodulation and address some of the existing controversies.
Journal ArticleDOI
Different frequencies for different scales of cortical integration: from local gamma to long range alpha/theta synchronization.
TL;DR: It is proposed that large scale integration is performed by synchronization among neurons and neuronal assemblies evolving in different frequency ranges, specifically involved in processing of internal mental context, i.e. for top-down processing.
References
More filters
Journal ArticleDOI
Receptive fields, binocular interaction and functional architecture in the cat's visual cortex
David H. Hubel,Torsten N. Wiesel +1 more
TL;DR: This method is used to examine receptive fields of a more complex type and to make additional observations on binocular interaction and this approach is necessary in order to understand the behaviour of individual cells, but it fails to deal with the problem of the relationship of one cell to its neighbours.
Journal ArticleDOI
Oscillatory responses in cat visual cortex exhibit inter-columnar synchronization which reflects global stimulus properties.
TL;DR: It is demonstrated here that neurons in spatially separate columns can synchronize their oscillatory responses, which has, on average, no phase difference, depends on the spatial separation and the orientation preference of the cells and is influenced by global stimulus properties.
Book
Nonparametrics: Statistical Methods Based on Ranks
TL;DR: Rank Tests for Comparing Two Treatments and Blocked Comparisons for two Treatments in a Population Model and the One-Sample Problem as discussed by the authors were used to compare more than two treatments.
Journal ArticleDOI
The Jackknife: The Bootstrap and Other Resampling Plans.
Leone Y. Low,Bradley Efron +1 more
Journal ArticleDOI
Visual feature integration and the temporal correlation hypothesis
Wolf Singer,Charles M. Gray +1 more
TL;DR: The mammalian visual system is endowed with a nearly infinite capacity for the recognition of patterns and objects, but to have acquired this capability the visual system must have solved what is a fundamentally combinatorial prob lem.
Related Papers (5)
Visual feature integration and the temporal correlation hypothesis
Wolf Singer,Charles M. Gray +1 more