Neural evidence for attentional capture by salient distractors

Poster Presentation 23.421: Saturday, May 18, 2024, 8:30 am – 12:30 pm, Pavilion
Session: Attention: Capture

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Rongqi Lin1 (), Xinyu Li2, Ole Jensen3, Jan Theeuwes4, Benchi Wang1; 1South China Normal University, 2Zhejiang Normal University, 3University of Birmingham, 4Vrije Universiteit Amsterdam

Salient objects often capture our attention, serving as distractors and hindering our current goals. It remains unclear when and how salient distractors interact with our goals and our knowledge on the neural mechanisms responsible for attentional capture is limited to a few brain regions recorded from non-human primates. Here we conducted a multivariate analysis on human intracranial signals (18 patients) covering most brain regions, and successfully dissociated distractor-specific representations from target-arousal signals in the high-frequency (60-100 Hz) activity. We found that salient distractors were processed rapidly around 220 ms, while target-tuning attention was attenuated simultaneously, supporting initial capture by distractors. Notably, neuronal activity specific to the distractor representation was strongest in superior and middle temporal gyrus, amygdala, and anterior cingulate cortex, while there were smaller contributions from parietal and frontal cortices. These results provide neural evidence for attentional capture by salient distractors engaging a much larger network than previously appreciated.