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. Author manuscript; available in PMC: 2017 Aug 3.
Published in final edited form as: Neuron. 2016 Jul 14;91(3):540–547. doi: 10.1016/j.neuron.2016.06.028

Figure 2. Inactivation-induced Variability Reduction is Ubiquitous.

Figure 2

(A) Spike rate of MT neurons for separate stimulus conditions with V2/V3 input intact (control; red), inactivated (blue), and recovered (green; n = 39 cells; 250 ms estimation window shown in Figure 1D). (B) Trial-to-trial variability, quantified by the Fano factor, reduced consistently for each stimulus condition during inactivation. The effect size was comparable across the five stimulus conditions (ANOVA, p = 0.82) but was significantly larger during spontaneous activity (t test, p = 0.003). (C) Same as (B) except for CV2. Spike pattern irregularity appeared to decline uniformly across all stimulus conditions during inactivation, including pre-stimulus fixation (ANOVA, p > 0.99). Data represented as mean ± SEM.