注意负荷下自下而上感知生物运动的神经处理。

IF 1.5 4区 心理学 Q4 NEUROSCIENCES
Hilal Nizamoglu , Burcu A. Urgen
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引用次数: 0

摘要

考虑到生物运动感知对一个人的生存和社会意义的重要性,它被认为是自动发生的。先前的行为结果表明,外围与任务无关的BM干扰了中央凹的任务表现。在选择性注意下,BM感知受到包括枕颞(OTC)、顶叶和运动前皮质在内的区域网络的支持。使用BM刺激的视网膜检查研究显示,在选择性注意下和远离选择性注意的情况下,其处理过程有不同的图谱。基于这些发现,我们研究了当BM作为一种与任务无关的刺激远离注意力焦点时,在注意力负荷下,人类大脑将如何处理自下而上的BM感知。参与者(N=31)接受了一项功能磁共振成像研究,在该研究中,他们在中央凹执行了一项要求注意的视觉检测任务,而在外围显示了完整或混乱的BM点光显示。我们的研究结果表明,注意负荷在额顶叶区域的主要影响,单变量活动图和多变量模式分析结果都支持注意负荷对任务无关的外周刺激的调节。然而,这种效应并不是完整的BM刺激所特有的,而是广泛应用于运动刺激,正如在外周存在动态刺激时运动敏感的OTC参与所证明的那样。这些结果证实并扩展了先前的工作,表明当有足够的注意力资源可用时,与任务无关的干扰物可以被刺激特定区域处理。我们讨论了这些结果对未来研究的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Neural processing of bottom-up perception of biological motion under attentional load

Considering its importance for one’s survival and social significance, biological motion (BM) perception is assumed to occur automatically. Previous behavioral results showed that task-irrelevant BM in the periphery interfered with task performance at the fovea. Under selective attention, BM perception is supported by a network of regions including the occipito-temporal (OTC), parietal, and premotor cortices. Retinotopy studies that use BM stimulus showed distinct maps for its processing under and away from selective attention. Based on these findings, we investigated how bottom-up perception of BM would be processed in the human brain under attentional load when it was shown away from the focus of attention as a task-irrelevant stimulus. Participants (N = 31) underwent an fMRI study in which they performed an attentionally demanding visual detection task at the fovea while intact or scrambled point light displays of BM were shown at the periphery. Our results showed the main effect of attentional load in fronto-parietal regions and both univariate activity maps and multivariate pattern analysis results support the attentional load modulation on the task-irrelevant peripheral stimuli. However, this effect was not specific to intact BM stimuli and was generalized to motion stimuli as evidenced by the motion-sensitive OTC involvement during the presence of dynamic stimuli in the periphery. These results confirm and extend previous work by showing that task-irrelevant distractors can be processed by stimulus-specific regions when there are enough attentional resources available. We discussed the implications of these results for future studies.

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来源期刊
Vision Research
Vision Research 医学-神经科学
CiteScore
3.70
自引率
16.70%
发文量
111
审稿时长
66 days
期刊介绍: Vision Research is a journal devoted to the functional aspects of human, vertebrate and invertebrate vision and publishes experimental and observational studies, reviews, and theoretical and computational analyses. Vision Research also publishes clinical studies relevant to normal visual function and basic research relevant to visual dysfunction or its clinical investigation. Functional aspects of vision is interpreted broadly, ranging from molecular and cellular function to perception and behavior. Detailed descriptions are encouraged but enough introductory background should be included for non-specialists. Theoretical and computational papers should give a sense of order to the facts or point to new verifiable observations. Papers dealing with questions in the history of vision science should stress the development of ideas in the field.
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