https://scholars.lib.ntu.edu.tw/handle/123456789/412260
標題: | Functional interplay of top-down attention with affective codes during visual short-term memory maintenance | 作者: | BO-CHENG KUO Lin, Szu Hung YEI-YU YEH |
關鍵字: | Attention | Emotion | Functional connectivity | Multivoxel pattern analysis | Visual short-term memory | 公開日期: | 1-六月-2018 | 出版社: | ELSEVIER MASSON, CORPORATION OFFICE | 卷: | 103 | 起(迄)頁: | 55 | 來源出版物: | Cortex | 摘要: | © 2018 Elsevier Ltd Visual short-term memory (VSTM) allows individuals to briefly maintain information over time for guiding behaviours. Because the contents of VSTM can be neutral or emotional, top-down influence in VSTM may vary with the affective codes of maintained representations. Here we investigated the neural mechanisms underlying the functional interplay of top-down attention with affective codes in VSTM using functional magnetic resonance imaging. Participants were instructed to remember both threatening and neutral objects in a cued VSTM task. Retrospective cues (retro-cues) were presented to direct attention to the hemifield of a threatening object (i.e., cue-to-threat) or a neutral object (i.e., cue-to-neutral) during VSTM maintenance. We showed stronger activity in the ventral occipitotemporal cortex and amygdala for attending threatening relative to neutral representations. Using multivoxel pattern analysis, we found better classification performance for cue-to-threat versus cue-to-neutral objects in early visual areas and in the amygdala. Importantly, retro-cues modulated the strength of functional connectivity between the frontoparietal and early visual areas. Activity in the frontoparietal areas became strongly correlated with the activity in V3a–V4 coding the threatening representations instructed to be relevant for the task. Together, these findings provide the first demonstration of top-down modulation of activation patterns in early visual areas and functional connectivity between the frontoparietal network and early visual areas for regulating threatening representations during VSTM maintenance. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/412260 | ISSN: | 00109452 | DOI: | 10.1016/j.cortex.2018.02.003 |
顯示於: | 心理學系 |
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