Fig. 8.

Substantial pulse train jitter is required to elicit an effect. A and B: response of one neuron to a 640-pps pulse train as a function of percent jitter. A: dot raster. Alternating colors mark blocks of trials for different amounts of jitter. B: corresponding rate-vs.-percent jitter curve. At least 70% jitter was required to evoke ongoing firing in this neuron. C: normalized firing rate as a function of percent jitter, averaged across neurons within the sluggish (gray, n = 12) and snappy (black, n = 20) groups. On average, snappy neurons did not respond unless the pulse train was jittered by at least 70%.