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Related Experiment Video

Updated: Jul 4, 2026

A Method for Remotely Silencing Neural Activity in Rodents During Discrete Phases of Learning
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A human-specific genetic modifier reconfigures large-scale cortical network dynamics underlying behavioral

Hanzhi T Zhao, Taylor R Anderson, Ewoud R E Schmidt

    Biorxiv : the Preprint Server for Biology
    |July 3, 2026
    PubMed
    Summary
    This summary is machine-generated.

    Human-specific gene SRGAP2C enhances brain connectivity and network dynamics during learning. This rewires cortical circuits, improving sensory discrimination and linking genomic changes to brain function.

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    Area of Science:

    • Neuroscience
    • Evolutionary Biology
    • Genetics

    Background:

    • Human brain evolution involved cortical expansion and altered connectivity.
    • The functional impact of these architectural changes on network computation remains unclear.

    Purpose of the Study:

    • To investigate how modified cortical architecture affects network dynamics during learning.
    • To understand the role of the human-specific gene SRGAP2C in reshaping brain networks.

    Main Methods:

    • Utilized a mouse model engineered to express SRGAP2C.
    • Assessed network dynamics during a sensory discrimination learning task.
    • Analyzed interhemispheric correlations, task-relevant encoding, and regional influences.

    Main Results:

    • SRGAP2C expression led to broader interhemispheric correlation and distributed task encoding.
    • Enhanced directed influence from frontal and associative regions was observed.
    • Texture representations in sensory cortex became more separable during motor preparation, improving discrimination.

    Conclusions:

    • Human-specific cortical architecture reconfigures, rather than scales, network dynamics.
    • These changes support sensory-to-motor transformations critical for demanding tasks.
    • Genomic innovations in Homo lineage are linked to large-scale cortical network function.