Shifting the spotlight of attention: evidence for discrete computations in cognition
Author(s)
Buschman, Tim; Miller, Earl K.
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Our thoughts have a limited bandwidth; we can only fully process a few items in mind simultaneously. To compensate, the brain developed attention, the ability to select information relevant to the current task, while filtering out the rest. Therefore, by understanding the neural mechanisms of attention we hope to understand a core component of cognition. Here, we review our recent investigations of the neural mechanisms underlying the control of visual attention in frontal and parietal cortex. This includes the observation that the neural mechanisms that shift attention were synchronized to 25 Hz oscillatory brain rhythms, with each shift in attention falling within a single cycle of the oscillation. We generalize these findings to present a hypothesis that cognition relies on neural mechanisms that operate in discrete, periodic computations, as reflected in ongoing oscillations. We discuss the advantages of the model, experimental support, and make several testable hypotheses.
Date issued
2010-11Department
Massachusetts Institute of Technology. Department of Brain and Cognitive Sciences; McGovern Institute for Brain Research at MIT; Picower Institute for Learning and MemoryJournal
Frontiers in Human Neuroscience
Publisher
Frontiers Media S.A.
Citation
Buschman, Timothy J. and Earl K. Miller "Shifting the spotlight of attention: evidence for discrete computations in cognition." (2010) Front. Hum. Neurosci. 4:194.
Version: Final published version
ISSN
1662-5161