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Alternative TitleHow monkey MST encoding biological motion information
Thesis Advisor张弢
Degree Grantor中国科学院大学
Place of Conferral中国科学院心理研究所
Degree Name理学硕士
Degree Discipline认知神经科学
Keyword生物运动 MST 特征信息 编码



实验设计:本实验采用2*2*2的三因素实验设计,三个因素分别是形状、倒置效应、行进方向。形状因素有2个水平,分别为形状完整和形状打乱(intact-scrambled。倒置效应因素有2个水平,分别为正立和倒立(upright-inverted。行进方向因素有2个水平,分别为向右走和向左走C right-left。总共有8种组合。



Other Abstract

Background: Biological motion recognition is important for individual survival and social interaction. Current researches have found that recognition effects of biological motion include form, inversion effects, and walking direction. The researches on brain imaging, neurobiology, brain injury and brain diseases related to biological motion have revealed that the superior temporal sulcus is very important in biological motion information processing. Although the two-pathway model provides a good theoretical basis for understanding the process of biological motion information processing, it lacks empirical research eviendce on neuroeletrophysiology.

Purpose: The aim of our research is to explore how macaque meidal superior temporal area(MST) encodes the three features of biological motion(form, inversion effect and walking direction.

Experimental design: This experiment adopts 2*2*2 three-factor experimental design, and the three factors are form, inversion effect and walking direction. Form factor has two levels, form information intact and form information scrambled (intact vs scrambled). Inversion effect has two levels, upright and inverted. Walking direction has two levels, walking right and walking left.

Results: Single neuron analysis shows that there are neurons in macaque MST that can simultaneously encode three features of biological movement, and there are also neurons that can encode two or one single feature. The results of neuron population analysis showed that: (1) there was a significant difference in the neurons' response to the intact form point light display and scrambled point light display; (2) there was a significant difference in the neurons' response to the upright point light display and inverted point light display; (3) there was a significant difference in the neurons' response to preferential walking directional point light display and non-preferential walking directional point light display.

Conclusion and discussion: The MST brain region of macaques can encode three kinds of feature information of biological motion, namely form, inversion effect, and walking direction. From the response of single neurons to biological motion, it can be seen that the encoding process of MST neurons for biological motion feature information may be that they first encode single feature information, then complete double feature coding through single feature combination, and finally complete the encoding of biological motion feature information through successive layers and filtering mechanism. This study provided neuroelectrophysiological evidence for MST brain region to participate in encoding biological motion form feature, inversion effect feature, especially the walking direction feature.

Document Type学位论文
Recommended Citation
GB/T 7714
汤琴. 猕猴MST对生物运动特征信息的编码[D]. 中国科学院心理研究所. 中国科学院大学,2019.
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