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- W1495006809 abstract "Background Sensory cortex often undergoes population activity fluctuations due to attentional modulations and arousal changes, but activity fluctuations can also be generated intrinsically. The mechanisms that underlie these spontaneous activity fluctuations are unknown, in particular whether they arise from common inputs or more active neuronal processes. We measured the activity of tens of V1 neurons simultaneously in monkeys stimulated with oriented visual stimuli, and found that the tuning curves (TCs) of orientation selective neurons spontaneously underwent shifts and multiplicative scalings proportional to population activity while their widths remained constant Based on this observed TC activity dependence, we constructed a precise statistical model featuring Poissonlike firing, shifts and gain modulation. The model not only accounted for neuronal co-variability but also approached the performance of state-of-art decoding methods. Surprisingly, we found that decoding performance on sensory stimuli increased with population activity, despite the fact that the stimulus was identical. Therefore, spontaneous population activity fluctuations display highly non-random features, boosting TCs by shifts and multiplicative factors that gate information processing." @default.
- W1495006809 created "2016-06-24" @default.
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- W1495006809 date "2013-07-01" @default.
- W1495006809 modified "2023-09-24" @default.
- W1495006809 title "Spontaneous population activity fluctuations boost sensory tuning curves and gate information processing" @default.
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- W1495006809 doi "https://doi.org/10.1186/1471-2202-14-s1-p281" @default.
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