Ventrolateral periaqueductal gray neurons prioritize threat probability over fear output.

While numerically greater firing to uncertainty over safety failed to reach significance in the first 1 s interval (t 28 = 1.37, p=0.18), ANOVA restricted to uncertainty and safety (100 ms: 1 s prior to cue onset through first 5 s of the cue) revealed a significant cue x bin interaction (F 59,1652 = 1.50, p=0.01, η p 2 = 0.051, op = 1.00).

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