In order to investigate the timescale over which timing precision is significant in complex neuronal networks, a similarity measure is defined for spike trains. This measure requires a similarity function which is optimized using a simple artificial neural net.

A few years ago, Yoshiko Kojima, Yoshiki Iwamoto, and Kaoru Yoshida (2004) took their monkey to a darkened room and measured its eye movements (saccades) in response to display of visual targets. Usually, when a target is shown at 10 o with respect to current fixation, the animal makes a 10 o saccade to foveate the target. If we define saccadic gain as the ratio between the displacement of the ...

Increasing evidence suggests that cortical dynamics during wake exhibits long-range temporal correlations suitable to integrate inputs over extended periods of time to increase the signal-to-noise ratio in decision making and working memory tasks. Accordingly, sleep has been suggested as a state characterized by a breakdown of long-range correlations. However, detailed measurements of neuronal ...