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  Attention But Not Awareness Modulates the BOLD Signal in the Human V1 During Binocular Suppression

Watanabe, M., Cheng, K., Murayama, Y., Ueno, K., Asamizuya, T., Tanaka, K., et al. (2011). Attention But Not Awareness Modulates the BOLD Signal in the Human V1 During Binocular Suppression. Science, 334(6057), 829-831. doi:10.1126/science.1203161.

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Watanabe, M1, 2, Autor           
Cheng, K, Autor
Murayama, Y1, 2, Autor           
Ueno, K, Autor
Asamizuya, T, Autor
Tanaka, K, Autor
Logothetis, NK1, 2, Autor           
Affiliations:
1Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497798              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              

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 Zusammenfassung: Although recent psychophysical studies indicate that visual awareness and top-down attention are two distinct processes, it is not clear how they are neurally dissociated in the visual system. Using a two-by-two factorial functional magnetic resonance imaging design with binocular suppression, we found that the visibility or invisibility of a visual target led to only nonsignificant blood oxygenation level–dependent (BOLD) effects in the human primary visual cortex (V1). Directing attention toward and away from the target had much larger and robust effects across all study participants. The difference in the lower-level limit of BOLD activation between attention and awareness illustrates dissociated neural correlates of the two processes. Our results agree with previously reported V1 BOLD effects on attention, while they invite a reconsideration of the functional role of V1 in visual awareness.

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 Datum: 2011-11
 Publikationsstatus: Erschienen
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 Identifikatoren: DOI: 10.1126/science.1203161
BibTex Citekey: WatanabeCMUATL2011
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Titel: Science
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Washington, D.C. : American Association for the Advancement of Science
Seiten: - Band / Heft: 334 (6057) Artikelnummer: - Start- / Endseite: 829 - 831 Identifikator: ISSN: 0036-8075
CoNE: https://pure.mpg.de/cone/journals/resource/991042748276600_1