Sloan Center for Theoretical Neurobiology, University of California at San Francisco
Spike precision and information in cat visual thalamus
One of the central themes in neural coding concerns the role of response variability and noise in determining the level of redundancy vs. synergy among spikes and among cells. This issue is investigated by quantifying the degree of precision in and the information transmission properties of individual spike train responses to full field, binary stimuli. The main conclusions are that (1) the responses can be highly reproducible in their spike timing (1.3 ms standard deviation) and spike count (0.3 variance normalized by the mean); (2) the coding efficiency from these responses can be quite high (67%); and (3) there appears to be little sign of redundancy in successive spikes.