Table 1.

Properties of statistical homogeneity for cortical neurons

Response propertyApproximate value
Dynamic range of response0–200 spikes/sec
Distribution of interspike intervalsApproximately exponential
Spike count varianceVariance ∼1–1.5 times the mean count
Spike rate modulationExpected rate can vary in ∼1 ISI, 5–10 msec