Recording from two neurons: second order stimulus reconstruction from spike trains and population coding

Details Recording from two neurons: second order stimulus reconstruction from spike trains and population coding Recording from two neurons: second order stimulus reconstruction from spike trains and population coding

2009-06-16

arxiv.org/abs/0906.3023v2

Biology

Quantitative Biology

Neurons and Cognition

Scientific paper

We study the reconstruction of visual stimuli from spike trains, recording simultaneously from the two H1 neurons located in the lobula plate of the fly Chrysomya megacephala. The fly views two types of stimuli, corresponding to rotational and translational displacements. If the reconstructed stimulus is to be represented by a Volterra series and correlations between spikes are to be taken into account, first order expansions are insufficient and we have to go to second order, at least. In this case higher order correlation functions have to be manipulated, whose size may become prohibitively large. We therefore develop a Gaussian-like representation for fourth order correlation functions, which works exceedingly well in the case of the fly. The reconstructions using this Gaussian-like representation are very similar to the reconstructions using the experimental correlation functions. The overall contribution to rotational stimulus reconstruction of the second order kernels - measured by a chi-squared averaged over the whole experiment - is only about 8% of the first order contribution. Yet if we introduce an instant-dependent chi-square to measure the contribution of second order kernels at special events, we observe an up to 100% improvement. As may be expected, for translational stimuli the reconstructions are rather poor. The Gaussian-like representation could be a valuable aid in population coding with large number of neurons.

Affiliated with

Also associated with

No associations

Rating

Recording from two neurons: second order stimulus reconstruction from spike trains and population coding 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 Recording from two neurons: second order stimulus reconstruction from spike trains and population coding, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recording from two neurons: second order stimulus reconstruction from spike trains and population coding will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-221952