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    Home > Biochemistry News > Biotechnology News > Recognizing familiar faces relies on neural codes shared between brains

    Recognizing familiar faces relies on neural codes shared between brains

    • Last Update: 2021-11-14
    • Source: Internet
    • Author: User
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    Photo: Graduate students of the same doctoral program participated in a functional magnetic resonance imaging experiment.
    They observed the faces of four classmates and four visually familiar strangers
    .


    The linear classifier between the hyper-aligned and the subjects showed that visual information was shared in the brains of the subjects, whether it was a personal identity or a visually familiar identity


    The ability to recognize familiar faces is the basis of social interaction
    .


    This process provides visual information and activates social and personal knowledge of a familiar person


    "In the visual processing area, we found that the brains of people with the same friends and acquaintances share personally and visually familiar face information
    .


    " said first author Matteo Visconti di Oleggio Castello, who is in Psychology and Brain Science at Dartmouth University Conducted this research at the graduate level and is now a neuroscience postdoctoral scholar at the University of California, Berkeley


    In this study, the research team used a method called hyper-alignment, which creates a common representation space to understand how similar brain activity among participants is
    .


    The research team used data from three fMRI missions conducted by 14 graduate students who had known each other for at least two years


    The results show that the identities of visually familiar faces and personally familiar faces are accurately decoded in the areas of the brain that mainly involve visual processing of faces
    .


    However, outside of the visual area, there are not many decodings


    When deciphering the familiar identities of individuals, the results of the study showed that there was more shared information in the brains of participants
    .


    The decoding accuracy of the other four areas outside the visual system is also high: the dorsal medial prefrontal cortex, which is known to participate in social processing (processing the intentions and characteristics of others); the precuneus, this area is processing familiar faces.


    "This conceptual space for sharing the personal knowledge of others allows us to communicate with people we know together," Maria (Ada), associate professor of research in the Cognitive Science Program at Dartmouth University and associate professor of the Department of Experimental, Diagnostic and Specialist Medicine at the University of Bologna Corbini said
    .

    The research team found in past fMRI experiments that when a person sees a person they are familiar with, the "theory of mind" area in the brain is activated
    .


    Corbini said: "When we see someone we know, we immediately activate that person


    Ames Haxby, professor of psychology and brain science at Dartmouth and co-author of the paper, said: "It is very possible that everyone has their own personal guidelines, but this is not the case
    .


    " "Our research shows that dealing with familiar Faces are indeed related to common sense of people


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