Unmasking the contribution of low-level features to the guidance of attention
Autor(en): | Ossandón, José P. Onat, Selim Cazzoli, Dario Nyffeler, Thomas Müri, Rene König, Peter |
Affiliationen: | Universität Osnabrück, Institut für Kognitionswissenschaft, Albrechtstr. 28, 49076 Osnabrück, Germany. jossando@uos.de | Stichwörter: | Space Perception/physiology; Perceptual Masking/physiology; Eye Movements; Humans; Middle Aged; Male; Reaction Time; Functional Laterality; Transcranial Magnetic Stimulation; Young Adult; Photic Stimulation/methods; Adult; Female; Pattern Recognition, Visual/physiology; Aged; Attention/physiology; Perceptual Disorders/physiopathology/psychology | Erscheinungsdatum: | 2012 | 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. |
DOI: | 10.1016/j.neuropsychologia.2012.09.043 |
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geprüft am 15.05.2024