Population activity statistics dissect subthreshold and spiking variability in V1

Response statistics dissect the contributions of different sources of variability to population activity in V1

Response variability, as measured by fluctuating responses upon repeated performance of trials, is a major component of neural responses, and its characterization is key to interpret high dimensional population recordings. Response variability and covariability display predictable changes upon changes in stimulus and cognitive or behavioral state, providing an opportunity to test the predictive...

Relation between single neuron and population spiking statistics and effects on network activity.

To simplify theoretical analyses of neural networks, individual neurons are often modeled as Poisson processes. An implicit assumption is that even if the spiking activity of each neuron is non-Poissonian, the composite activity obtained by summing many spike trains limits to a Poisson process. Here, we show analytically and through simulations that this assumption is invalid. Moreover, we show...

Uniform Spatial Spread of Population Activity in Primate Parafoveal V1 2 3 Uniform Spread of V1 Population Activity 12 13

Title: 1 Uniform spatial spread of population activity in primate parafoveal V1 2 3 Authors: 4 Chris R. Palmer, Yuzhi Chen, and Eyal Seidemann 5 Dept. of Psychology and Center for Perceptual Systems, University of Texas at Austin 6 Austin, TX 78712, USA 7 8 1 These authors contributed equally to this work 9 10 Running Head: 11 Uniform spread of V1 population activity 12 13 Corresponding author:...

Inter-individual Variability of Coumarin 7-hydroxylation (CYP2A6 activity) in an Iranian Population

Uniform spatial spread of population activity in primate parafoveal V1.

What are the shape and size of the region in primate V1 that processes information from a single point in visual space? This region, a fundamental property termed cortical point image (CPI) (McIlwain 1986), represents the minimal population of V1 neurons that can be activated by a visual stimulus and therefore has important implications for population coding in the cortex. Previous indirect att...