Levi Aaron J, Huk Alexander C
Center for Perceptual Systems, Departments of Neuroscience & Psychology, The University of Texas at Austin 78712.
Curr Opin Physiol. 2020 Aug;16:27-32. doi: 10.1016/j.cophys.2020.04.006. Epub 2020 May 15.
Perceptual decisions are informed by the accumulation of sensory evidence over time, but the form of this fundamental temporal computation is not fully understood. Characterizations of the temporal integration of sensory stimuli in behavior and neural activity are usually conceived with separate stages for sensory encoding and downstream integration for accumulating the sensory evidence. Sensory and decision stages can each have their own temporal dynamics that affect the time course of perception and action. Here, we discuss recent work using temporal signatures of behavior in the context of traditional two-stage models. This discussion highlights shortcomings of two stage sensory/decision frameworks, points towards how modern techniques can provide more realistic characterizations of temporal integration, and in turn motivates a richer philosophical framework for building models of how sensory data might be interpreted by the brain to produce actions.
感知决策是由随时间积累的感官证据所指导的，但这种基本时间计算的形式尚未完全被理解。行为和神经活动中感官刺激的时间整合特征通常被认为有单独的感官编码阶段和用于积累感官证据的下游整合阶段。感官阶段和决策阶段各自都可能有其自身的时间动态，这些动态会影响感知和行动的时间进程。在这里，我们讨论在传统两阶段模型背景下使用行为时间特征的近期研究工作。这次讨论突出了两阶段感官/决策框架的缺点，指出了现代技术如何能够提供更现实的时间整合特征，进而推动建立一个更丰富的哲学框架，以构建关于大脑如何解释感官数据以产生行动的模型。
