Transient pupil response is modulated by contrast-based saliency

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題名:	Transient pupil response is modulated by contrast-based saliency
作者:	汪勁安;Wang, Chin-An;Boehnke, Susan E.;Itti, Laurent;Munoz, Douglas P.
貢獻者:	生醫理工學院認知神經科學研究所
關鍵詞:	Acoustic Stimulation;Animals;Macaca mulatta;Male;Orientation - physiology;Photic Stimulation;Pupil - physiology;Superior Colliculi - physiology;Visual Perception - physiology
日期:	2014-01-13
上傳時間:	2026-04-23 14:47:10 (UTC+8)
出版者:	Society for Neuroscience;United States: Society for Neuroscience
摘要:	摘要： The sudden appearance of a novel stimulus in the environment initiates a series of orienting responses that include coordinated shifts of gaze and attention, and also transient changes in pupil size. Although numerous studies have identified a significant effect of stimulus saliency on shifts of gaze and attention, saliency effects on pupil size are less understood. To examine salience-evoked pupil responses, we presented visual, auditory, or audiovisual stimuli while monkeys fixated a central visual spot. Transient pupil dilation was elicited after visual stimulus presentation regardless of target luminance relative to background, and auditory stimuli also evoked similar pupil responses. Importantly, the evoked pupil response was modulated by contrast-based saliency, with faster and larger pupil responses following the presentation of more salient stimuli. The initial transient component of pupil dilation was qualitatively similar to that evoked by weak microstimulation of the midbrain superior colliculus. The pupil responses elicited by audiovisual stimuli were well predicted by a linear summation of each modality response. Together, the results suggest that the transient pupil response, as one component of orienting, is modulated by contrast-based saliency, and the superior colliculus is likely involved in its coordination. 其他題名： J Neurosci 出版者： United States: Society for Neuroscience 出版日期： 2014-01-08 出處： The Journal of Neuroscience, 2014-01, Vol.34 (2), p.408-417 版權： Copyright © 2014 the authors 0270-6474/14/340408-10$15.00/0 2014 識別號： ISSN: 0270-6474 識別號： ISSN: 1529-2401 識別號： EISSN: 1529-2401 識別號： DOI: 10.1523/jneurosci.3550-13.2014 識別號： PMID: 24403141
顯示於類別:	[認知與神經科學研究所 ] 期刊論文

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