In Selective Attention Through Selective Neuronal Synchronization, Thilo Womelsdorf and Pascal Fries say (p. 298 of The Cognitive Neurosciences, Fourth Edition, MIT Press, 2009):
Therefore these findings suggest that inter-areal communication during attentional top-down control is conveyed particularly through rhythmic synchronization in a high beta band, either in addition to or separate from the frequency of rhythmic interactions underlying bottom-up feedforward signaling.
Top-down attention is directed attention, as in "look at that cat," while bottom-up attention is triggered attention, as in "something is amiss in this picture." Attention and rhythm; that forms a nice underpinning for social behaviors.
Bertrand du Castel
Therefore these findings suggest that inter-areal communication during attentional top-down control is conveyed particularly through rhythmic synchronization in a high beta band, either in addition to or separate from the frequency of rhythmic interactions underlying bottom-up feedforward signaling.
Top-down attention is directed attention, as in "look at that cat," while bottom-up attention is triggered attention, as in "something is amiss in this picture." Attention and rhythm; that forms a nice underpinning for social behaviors.
Bertrand du Castel
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