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Rhythmic attentional scanning
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Abstract
<p xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" class="first" dir="auto"
id="d920451e59">Sensory processing, short-term memory, and decision-making often deal
with multiple
items, or options, simultaneously. I review evidence suggesting that the brain handles
such multiple items by "rhythmic attentional scanning (RAS)": each item is processed
in a separate cycle of the theta rhythm, involving several gamma cycles, to reach
an internally consistent representation in the form of a gamma-synchronized neuronal
group. Within each theta cycle, items that are extended in representational space
are scanned by traveling waves. Such scanning might go across small numbers of simple
items linked into a chunk.
</p>