A new multi-neuron spike-train metric

In order to use simultaneous recordings of spike trains from pairs of proximate neuron to study how information about a stimuli is encoded across a population of neurons, the Victor-Purpura spike-train metric has recently been extended to a family of multi-neuron metrics. The Victor-Purpura metric is one of the two metrics commonly used for quantifying the distance between two spike trains, the other is the van Rossum metric. Here, we suggest an extension of the van Rossum metric to a multi-neuron metric, we believe this gives a metric which is both natural and easy to calculate.