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<p>The human brain’s capacity for visual information processing is essential for higher-order cognitive functions, including facial recognition and spatial navigation. However, the millisecond-scale dynamics of cortico-subcortical information flow during novel visual stimulation remain unclear. To investigate this, we conducted intracranial electroencephalography (iEEG) recordings in 22 patients with refractory epilepsy as they underwent a picture-viewing task. Our findings showed region-specific modulations in high-frequency broadband (HFB, 60–160 Hz) activity across multiple brain regions, such as the dorsal and ventral visual streams, the limbic system, and higher-order cortical areas. Initial activation followed a hierarchical, back-to-front propagation pattern, starting from the primary visual areas, progressing through the ventral and dorsal streams, and ultimately engaging high-order cortical and limbic structures. Extensive top-down connectivity from higher-order cortex to limbic areas further revealed their role in novel visual processing, providing a high-resolution spatiotemporal map of visual information flow across brain regions.</p>

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Brain-wide information flow dynamics during novel visual processing in humans

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年5月18日

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  • Wushuang Huang,
  • Jianping Song,
  • Jingru Huangfu,
  • Shanshan Liang,
  • Zhiji Wang,
  • Xiang Liao,
  • Chunqing Zhang,
  • Xiaowei Chen,
  • Rongdi Yuan,
  • Lukang Wang

摘要

The human brain’s capacity for visual information processing is essential for higher-order cognitive functions, including facial recognition and spatial navigation. However, the millisecond-scale dynamics of cortico-subcortical information flow during novel visual stimulation remain unclear. To investigate this, we conducted intracranial electroencephalography (iEEG) recordings in 22 patients with refractory epilepsy as they underwent a picture-viewing task. Our findings showed region-specific modulations in high-frequency broadband (HFB, 60–160 Hz) activity across multiple brain regions, such as the dorsal and ventral visual streams, the limbic system, and higher-order cortical areas. Initial activation followed a hierarchical, back-to-front propagation pattern, starting from the primary visual areas, progressing through the ventral and dorsal streams, and ultimately engaging high-order cortical and limbic structures. Extensive top-down connectivity from higher-order cortex to limbic areas further revealed their role in novel visual processing, providing a high-resolution spatiotemporal map of visual information flow across brain regions.