Object color knowledge representation occurs in the macaque brain despite the absence of a developed language system.

IF 9.8 1区 生物学 Q1 Agricultural and Biological Sciences PLoS Biology Pub Date : 2024-10-28 eCollection Date: 2024-10-01 DOI:10.1371/journal.pbio.3002863
Minghui Zhao, Yumeng Xin, Haoyun Deng, Zhentao Zuo, Xiaoying Wang, Yanchao Bi, Ning Liu
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Abstract

Animals guide their behaviors through internal representations of the world in the brain. We aimed to understand how the macaque brain stores such general world knowledge, focusing on object color knowledge. Three functional magnetic resonance imaging (fMRI) experiments were conducted in macaque monkeys: viewing chromatic and achromatic gratings, viewing grayscale images of their familiar fruits and vegetables (e.g., grayscale strawberry), and viewing true- and false-colored objects (e.g., red strawberry and green strawberry). We observed robust object knowledge representations in the color patches, especially the one located around TEO: the activity patterns could classify grayscale pictures of objects based on their memory color and response patterns in these regions could translate between chromatic grating viewing and grayscale object viewing (e.g., red grating-grayscale images of strawberry), such that classifiers trained by viewing chromatic gratings could successfully classify grayscale object images according to their memory colors. Our results showed direct positive evidence of object color memory in macaque monkeys. These results indicate the perceptually grounded knowledge representation as a conservative memory mechanism and open a new avenue to study this particular (semantic) memory representation with macaque models.

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尽管猕猴大脑中没有发达的语言系统,但却存在物体颜色知识表征。
动物通过大脑中的内部世界表征来指导自己的行为。我们的目的是了解猕猴大脑是如何存储这种一般世界知识的,重点是物体颜色知识。我们在猕猴身上进行了三项功能磁共振成像(fMRI)实验:观看色光和消色光光栅、观看它们熟悉的水果和蔬菜的灰度图像(如灰度草莓)以及观看真色和假色物体(如红色草莓和绿色草莓)。我们在颜色斑块中观察到了强大的物体知识表征,尤其是位于TEO周围的颜色斑块:这些活动模式可以根据物体的记忆颜色对灰度图片进行分类,而且这些区域的反应模式可以在观看色光栅和观看灰度物体之间进行转换(例如,红色光栅-灰度草莓图像),因此通过观看色光栅训练的分类器可以根据物体的记忆颜色成功地对灰度物体图像进行分类。我们的研究结果显示了猕猴对物体颜色记忆的直接正面证据。这些结果表明,以知觉为基础的知识表征是一种保守的记忆机制,并为利用猕猴模型研究这种特殊的(语义)记忆表征开辟了一条新途径。
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来源期刊
PLoS Biology
PLoS Biology BIOCHEMISTRY & MOLECULAR BIOLOGY-BIOLOGY
CiteScore
15.40
自引率
2.00%
发文量
359
审稿时长
3-8 weeks
期刊介绍: PLOS Biology is the flagship journal of the Public Library of Science (PLOS) and focuses on publishing groundbreaking and relevant research in all areas of biological science. The journal features works at various scales, ranging from molecules to ecosystems, and also encourages interdisciplinary studies. PLOS Biology publishes articles that demonstrate exceptional significance, originality, and relevance, with a high standard of scientific rigor in methodology, reporting, and conclusions. The journal aims to advance science and serve the research community by transforming research communication to align with the research process. It offers evolving article types and policies that empower authors to share the complete story behind their scientific findings with a diverse global audience of researchers, educators, policymakers, patient advocacy groups, and the general public. PLOS Biology, along with other PLOS journals, is widely indexed by major services such as Crossref, Dimensions, DOAJ, Google Scholar, PubMed, PubMed Central, Scopus, and Web of Science. Additionally, PLOS Biology is indexed by various other services including AGRICOLA, Biological Abstracts, BIOSYS Previews, CABI CAB Abstracts, CABI Global Health, CAPES, CAS, CNKI, Embase, Journal Guide, MEDLINE, and Zoological Record, ensuring that the research content is easily accessible and discoverable by a wide range of audiences.
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