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Vision involves constant exploration of the environment by eye movements. Recent evidence suggests that a rhythmic form of exploration also occurs under covert attention, in the absence of eye movements. Sustained attention naturally fluctuates, with a periodicity in the theta (4-8 Hz) frequency range. Copyright © 2013 Elsevier Ltd. All rights reserved.
Citation
Rufin VanRullen. Visual attention: a rhythmic process? Current biology : CB. 2013 Dec 16;23(24):R1110-2
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PMID: 24355791
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