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      Dynamic predictions: oscillations and synchrony in top-down processing.

      1 ,   ,
      Nature reviews. Neuroscience
      Springer Science and Business Media LLC

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          Abstract

          Classical theories of sensory processing view the brain as a passive, stimulus-driven device. By contrast, more recent approaches emphasize the constructive nature of perception, viewing it as an active and highly selective process. Indeed, there is ample evidence that the processing of stimuli is controlled by top-down influences that strongly shape the intrinsic dynamics of thalamocortical networks and constantly create predictions about forthcoming sensory events. We discuss recent experiments indicating that such predictions might be embodied in the temporal structure of both stimulus-evoked and ongoing activity, and that synchronous oscillations are particularly important in this process. Coherence among subthreshold membrane potential fluctuations could be exploited to express selective functional relationships during states of expectancy or attention, and these dynamic patterns could allow the grouping and selection of distributed neuronal responses for further processing.

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          Author and article information

          Journal
          Nat Rev Neurosci
          Nature reviews. Neuroscience
          Springer Science and Business Media LLC
          1471-003X
          1471-003X
          Oct 2001
          : 2
          : 10
          Affiliations
          [1 ] Cellular Neurobiology Group, Institute for Medicine, Research Centre Jülich, 52425 Jülich, Germany. a.k.engel@fz-juelich.de
          Article
          35094565
          10.1038/35094565
          11584308
          8d5daf6c-74a5-4c27-9cb1-be3bbd67f6cd
          History

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