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. 2008 Jun 25;100(3):1476–1487. doi: 10.1152/jn.90446.2008

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FIG. 3. — Developmental changes in variance-to-mean ratios during the transient and sustained firing of V1 and V2 neurons. A: PSTH for an adult V1 complex cell from which its variance-to-mean ratio was calculated for transient and sustained components. For the measurement window, the transient firing was sampled for a period of 50 ms around the peak (left ) and the sustained discharge was sampled for the same duration (50 ms) at 100 ms prior to the end of 640-ms stimulation (right ). B: scatter plots of the variance-to-mean ratios of individual V1 (top) and V2 (bottom) neurons during transient discharge against their variance-to-mean ratios during sustained firing. Frequency histograms and median values (▾) are also illustrated for the transient and sustained components.

Inline graphic — Developmental changes in variance-to-mean ratios during the transient and sustained firing of V1 and V2 neurons. A: PSTH for an adult V1 complex cell from which its variance-to-mean ratio was calculated for transient and sustained components. For the measurement window, the transient firing was sampled for a period of 50 ms around the peak (left ) and the sustained discharge was sampled for the same duration (50 ms) at 100 ms prior to the end of 640-ms stimulation (right ). B: scatter plots of the variance-to-mean ratios of individual V1 (top) and V2 (bottom) neurons during transient discharge against their variance-to-mean ratios during sustained firing. Frequency histograms and median values (▾) are also illustrated for the transient and sustained components.