ISSN 1671-3710
CN 11-4766/R
主办：中国科学院心理研究所
出版：科学出版社

心理科学进展 ›› 2023, Vol. 31 ›› Issue (suppl.): 5-5.

• 视觉信息处理 • 上一篇    下一篇

Changing Gears to See Fast and Slow: Hierarchical Computation of Velocity Across V1, MT, and MST in Non-human Primates

Ke-Yan Hea,b#, Ye Wangc#, Jun-Xiang Luoa, Xiao-Hong Lia, Lixuan Liua,b, Yiliang Lua,*, Ian Max Andolinaa, Naill McLoughlind, Stewart Shippa, Lothar Spillmann, Wei Wanga,b,*   

  1. aInstitute of Neuroscience, State Key Laboratory of Neuroscience, Key Laboratory of Primate Neurobiology, Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai 200031, China;
    b University of Chinese Academy of Sciences, Beijing 100049, China;
    cNeuroscience and Intelligent Media Institute, Communication University of China, Beijing 100024, P.R. China;
    dDivision of Pharmacy & Optometry, The University of Manchester
  • 出版日期:2023-08-26 发布日期:2023-09-11

Changing Gears to See Fast and Slow: Hierarchical Computation of Velocity Across V1, MT, and MST in Non-human Primates

Ke-Yan Hea,b#, Ye Wangc#, Jun-Xiang Luoa, Xiao-Hong Lia, Lixuan Liua,b, Yiliang Lua,*, Ian Max Andolinaa, Naill McLoughlind, Stewart Shippa, Lothar Spillmann, Wei Wanga,b,*   

  1. aInstitute of Neuroscience, State Key Laboratory of Neuroscience, Key Laboratory of Primate Neurobiology, Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai 200031, China;
    b University of Chinese Academy of Sciences, Beijing 100049, China;
    cNeuroscience and Intelligent Media Institute, Communication University of China, Beijing 100024, P.R. China;
    dDivision of Pharmacy & Optometry, The University of Manchester
  • Online:2023-08-26 Published:2023-09-11
  • Contact: * E-mail: w.wang@ion.ac.cn
  • About author:KYH and JXL contributed equally to the experiment, and YW contributed to the model simulation
    # Equal contribution

Abstract: PURPOSE: Distinguishing velocity is critical for animals’ survival and human life. The visual dorsal pathway involves the perception of velocity. Although various studies about velocity have been reported, we know a rough speed range for each area respectively. How each brain area processes various velocities from low to high speed is still unclear. Specifically, how the higher-level brain areas process velocity when the lower-level areas lost direction selectivity at high speed. Our main hypothesis was that the lower-level areas could provide sequential retinotopic activations to the higher-level areas to process velocity at high speed.
METHODS: To get a whole picture of velocity processing for visual brain areas across speeds, we recorded single units in V1, MT, and MST in alert macaques for dots, gratings, and plaids. Then we built a receptive field model based on retinotopic information processing to simulate neuronal responses.
RESULTS: 1) The optimal speed and the cutoff speed of direction selectivity increased hierarchically along V1, MT, and MST, no matter the cell subtype (component, pattern, or unclassified), across increasing speed. 2) The differences in latencies among V1, MT, and MST suggested the hierarchically bottom-up processing for velocity. 3) Model results were consistent with the physiological observations.
CONCLUSIONS: These results supported our hypotheses that low-level areas provide retinotopic signals after losing direction selectivity for assisting high-level areas detect motion direction. This study may promote the understanding of velocity processing in the brain and the development of computer vision in artificial intelligence (AI).

Key words: primate, dorsal pathway, velocity processing, receptive field model