期刊
JOURNAL OF NEUROSCIENCE
卷 39, 期 39, 页码 7703-7714出版社
SOC NEUROSCIENCE
DOI: 10.1523/JNEUROSCI.0776-19.2019
关键词
attention; auditory scene analysis; microsaccades; pupil dilation; superior colliculus
资金
- EC Horizon 2020 grant
- Biotechnology and Biological Sciences Research Council international partnering award
- BBSRC [BB/L026864/1] Funding Source: UKRI
Despite the prevalent use of alerting sounds in alarms and human-machine interface systems and the long-hypothesized role of the auditory system as the brain's early warning system, we have only a rudimentary understanding of what determines auditory salience-the automatic attraction of attention by sound-and which brain mechanisms underlie this process. A major roadblock has been the lack of a robust, objective means of quantifying sound-driven attentional capture. Here we demonstrate that: (1) a reliable salience scale can be obtained from crowd-sourcing (N = 911), (2) acoustic roughness appears to be a driving feature behind this scaling, consistent with previous reports implicating roughness in the perceptual distinctiveness of sounds, and (3) crowd-sourced auditory salience correlates with objective autonomic measures. Specifically, we show that a salience ranking obtained from online raters correlated robustly with the superior colliculus-mediated ocular freezing response, microsaccadic inhibition (MSI), measured in naive, passively listening human participants (of either sex). More salient sounds evoked earlier and larger MSI, consistent with a faster orienting response. These results are consistent with the hypothesis that MSI reflects a general reorienting response that is evoked by potentially behaviorally important events regardless of their modality.
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