Show Reference: "Top-Down Versus Bottom-Up Control of Attention in the Prefrontal and Posterior Parietal Cortices"

Top-Down Versus Bottom-Up Control of Attention in the Prefrontal and Posterior Parietal Cortices Science, Vol. 315, No. 5820. (30 March 2007), pp. 1860-1862, doi:10.1126/science.1138071 by Timothy J. Buschman, Earl K. Miller
@article{buschman-and-miller-2007,
    abstract = {Attention can be focused volitionally by "top-down" signals derived from task demands and automatically by "bottom-up" signals from salient stimuli. The frontal and parietal cortices are involved, but their neural activity has not been directly compared. Therefore, we recorded from them simultaneously in monkeys. Prefrontal neurons reflected the target location first during top-down attention, whereas parietal neurons signaled it earlier during bottom-up attention. Synchrony between frontal and parietal areas was stronger in lower frequencies during top-down attention and in higher frequencies during bottom-up attention. This result indicates that top-down and bottom-up signals arise from the frontal and sensory cortex, respectively, and different modes of attention may emphasize synchrony at different frequencies.},
    address = {New York, N.Y.},
    author = {Buschman, Timothy J. and Miller, Earl K.},
    day = {30},
    doi = {10.1126/science.1138071},
    issn = {1095-9203},
    journal = {Science},
    keywords = {attention, bottom-up, synchrony, top-down},
    month = mar,
    number = {5820},
    pages = {1860--1862},
    pmid = {17395832},
    posted-at = {2013-04-15 13:38:42},
    priority = {2},
    title = {{Top-Down} Versus {Bottom-Up} Control of Attention in the Prefrontal and Posterior Parietal Cortices},
    url = {http://dx.doi.org/10.1126/science.1138071},
    volume = {315},
    year = {2007}
}

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LIP has been suggested to contain a saliency map of the visual field, to guide visual attention, and to decide about saccades.

Lateral prefrontal cortex (LPFC) and frontal eye fields (FEF) are frontal cortex regions involved in visual attention and target selection.

Both populations in prefrontal cortex and posterior parietal cortex show correlates of bottom-up and top-down visual attention.

In the pop-out condition of a visual search task, Buschman and Miller found that neurons in the posterior parietal cortex region LIP found the search target earlier than neurons in frontal cortex regions FEF and LPFC.

In the pure visual search condition of a visual search task, Buschman and Miller found that neurons in frontal cortex regions FEF and LPFC found the search target earlier than neurons in the posterior parietal cortex region LIP.