Unmasking the contribution of low-level features to the guidance of attention
Autor(en): | Ossandon, Jose P. Onat, Selim Cazzoli, Dario Nyffeler, Thomas Mueri, Rene Koenig, Peter |
Stichwörter: | Attention control; Behavioral Sciences; Bottom-up; FIXATION; LUMINANCE-CONTRAST; NATURAL SCENES; NEGLECT; Neurosciences; Neurosciences & Neurology; Psychology; Psychology, Experimental; SACCADIC EYE-MOVEMENTS; Saliency; SALIENCY MAP; SPATIAL-ATTENTION; THETA-BURST STIMULATION; TMS; TRANSCRANIAL MAGNETIC STIMULATION; VISUAL-ATTENTION | Erscheinungsdatum: | 2012 | Herausgeber: | PERGAMON-ELSEVIER SCIENCE LTD | Journal: | NEUROPSYCHOLOGIA | Volumen: | 50 | Ausgabe: | 14 | Startseite: | 3478 | Seitenende: | 3487 | Zusammenfassung: | 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. (C) 2012 Elsevier Ltd. All rights reserved. |
ISSN: | 00283932 | DOI: | 10.1016/j.neuropsychologia.2012.09.043 |
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geprüft am 15.05.2024