Unmasking the contribution of low-level features to the guidance of attention

Ossandón, José P; Onat, Selim; Cazzoli, Dario; Nyffeler, Thomas; Müri, Rene; König, Peter (2012). Unmasking the contribution of low-level features to the guidance of attention. Neuropsychologia, 50(14), pp. 3478-3487. Oxford: Elsevier 10.1016/j.neuropsychologia.2012.09.043

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The role of low-level stimulus-driven control in the guidance of overt visual attention has been difficult to establish because low- and high-level visual content are spatially correlated within natural visual stimuli. Here we show that impairment of parietal cortical areas, either permanently by a lesion or reversibly by repetitive transcranial magnetic stimulation (rTMS), leads to fixation of locations with higher values of low-level features as compared to control subjects or in a no-rTMS condition. Moreover, this unmasking of stimulus-driven control crucially depends on the intrahemispheric balance between top-down and bottom-up cortical areas. This result suggests that although in normal behavior high-level features might exert a strong influence, low-level features do contribute to guide visual selection during the exploration of complex natural stimuli.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research > ARTORG Center - Gerontechnology and Rehabilitation
04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurology

UniBE Contributor:

Cazzoli, Dario; Nyffeler, Thomas and Müri, René Martin

ISSN:

0028-3932

Publisher:

Elsevier

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 14:39

Last Modified:

05 Jan 2017 13:27

Publisher DOI:

10.1016/j.neuropsychologia.2012.09.043

PubMed ID:

23044277

Web of Science ID:

000313142700033

URI:

https://boris.unibe.ch/id/eprint/15762 (FactScience: 223196)

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