Existence of high-order correlations in cortical activity

Details Existence of high-order correlations in cortical activity Existence of high-order correlations in cortical activity

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003phrve..68d1905b&link_type=abstract

Physical Review E, vol. 68, Issue 4, id. 041905

Mathematics

Probability

2

Neuroscience, Probability Theory, Stochastic Processes, And Statistics, Structures And Organization In Complex Systems, Time Series Analysis, Time Variability

Scientific paper

Neurons collect signals originating from a large number of other cells. The variability of this integrated population activity at the millisecond time scale is a critical constraint on the degree of signal integration and processing performed by single neurons. Optical imaging, EEG, and fMRI studies have indicated that cortical activity shows a high degree of variability at a time scale of hundreds of ms. However, currently no experimental methods are available to directly assess the variability in the activity of populations of neurons at a time scale closer to that of the characteristic time constants of neurons, i.e., around 10 ms. Here we integrate pertinent experimental data in one rigorous mathematical framework to demonstrate that (1) the high temporal variability in the spiking activity of individual neurons, (2) the second-order correlation properties of the spiking activity of cortical neurons, and (3) the correlations of the subthreshold dynamics, all impose high amplitude, fast variability in the population activity of cortical neurons. This implies that higher order correlations, a necessary condition for temporal coding models, must be a central feature of cortical dynamics.

Affiliated with

Also associated with

No associations

Rating

Existence of high-order correlations in cortical activity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Existence of high-order correlations in cortical activity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Existence of high-order correlations in cortical activity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1035001