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Towards a unified understanding of lateralized vision: A large-scale study investigating principles governing patterns of lateralization using a heterogeneous sample
Cortex ( IF 3.6 ) Pub Date : 2020-09-29 , DOI: 10.1016/j.cortex.2020.08.029
Sanne G Brederoo 1 , Lise Van der Haegen 2 , Marc Brysbaert 2 , Mark R Nieuwenstein 3 , Frans W Cornelissen 4 , Monicque M Lorist 1
Affiliation  

While functional lateralization of the human brain has been a widely studied topic in the past decades, few studies to date have gone further than investigating lateralization of single, isolated processes. With the present study, we aimed to arrive at a more unified view by investigating lateralization patterns in face and word processing, and associated lower-level visual processing. We tested a large and heterogeneous participant group, and used a number of tasks that had been shown to produce replicable indices of lateralized processing of visual information of different types and complexity. Following Bayesian statistics, group-level analyses showed the expected right hemisphere (RH) lateralization for face, global form, low spatial frequency processing, and spatial attention, and left hemisphere (LH) lateralization for visual word and local feature processing. Compared to right-handed individuals, lateralization patterns of left-handed and especially those who are RH-dominant for language deviated from this ‘typical’ pattern. Our results support the notion that face and word processes come to be lateralized to homologue areas of the two hemispheres, under influence of the RH- and LH-specializations in global form, local feature, and low and high spatial frequency processing. As such, we present a more unified understanding of lateralized vision, providing evidence for the input asymmetry and causal complementarity principles of lateralized visual information processing. The absence of correlations between spatial attention and lateralization of the other processes supports the notion of their independent lateralization, conform the statistical complementarity principle.



中文翻译:

朝着对偏侧视觉的统一理解:使用异质样本研究控制偏侧模式的原理的大规模研究

尽管在过去的几十年中,人脑的功能性偏侧化一直是一个广泛研究的话题,但迄今为止,除了研究单个孤立过程的偏侧化之外,没有其他研究比这更深入。通过本研究,我们旨在通过研究面部和文字处理以及相关的较低级视觉处理中的横向化模式来获得更统一的视图。我们测试了一个庞大而异类的参与者组,并使用了许多任务,这些任务已显示出可重复生成的索引,可对不同类型和复杂性的视觉信息进行侧向处理。根据贝叶斯统计资料,小组级分析显示,人脸,整体形态,低空间频率处理和空间注意力的预期右半球(RH)偏侧化,左半球(LH)侧化,用于视觉单词和局部特征处理。与惯用右手的人相比,惯用左手的人,尤其是那些以RH为主的人的偏侧化模式偏离了这种“典型”模式。我们的结果支持这样一种观念,即在RH和LH专业化的整体形式,局部特征以及低和高空间频率处理的影响下,脸部和文字处理会被横向化到两个半球的同源区域。因此,我们提出了对横向视觉的更统一的理解,为横向视觉信息处理的输入不对称和因果互补原理提供了证据。

更新日期:2020-10-30
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