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<p>The spinal cord connects the brain to peripheral systems. Yet its integration with cerebral networks remains a key neuroscience question. Capturing structural and functional central nervous system (CNS) changes throughout the lifespan is essential for characterizing healthy and pathological aging. Leveraging a unique multimodal dataset combining spinal and cerebrospinal imaging, we jointly mapped the spinal cord structural and functional architecture across adulthood. Our results revealed age-related changes across these modalities and identified organizational principles shared with the brain. These changes were most pronounced in the somatosensory pathway, with microstructural decline coupled to shifts in functional connectivity and local spontaneous activity as aging progresses. Extending analyses to the brain uncovered convergent CNS-wide aging mechanisms, including gray matter loss, decreased functional segregation, and increased spontaneous activity, highlighting shared neural aging trajectories. Together, our findings provide a systems-level view of the age-related alteration in the CNS, offering a foundation for future studies investigating potential imaging markers of sensorimotor dysfunction.</p>

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Spinal cord structural and functional architecture and its shared organization with the brain across the adult lifespan

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月16日

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  • Caroline Landelle,
  • Nawal Kinany,
  • Samuelle St-Onge,
  • Ovidiu Lungu,
  • Dimitri Van De Ville,
  • Bratislav Misic,
  • Véronique Marchand-Pauvert,
  • Benjamin De Leener,
  • Julien Doyon

摘要

The spinal cord connects the brain to peripheral systems. Yet its integration with cerebral networks remains a key neuroscience question. Capturing structural and functional central nervous system (CNS) changes throughout the lifespan is essential for characterizing healthy and pathological aging. Leveraging a unique multimodal dataset combining spinal and cerebrospinal imaging, we jointly mapped the spinal cord structural and functional architecture across adulthood. Our results revealed age-related changes across these modalities and identified organizational principles shared with the brain. These changes were most pronounced in the somatosensory pathway, with microstructural decline coupled to shifts in functional connectivity and local spontaneous activity as aging progresses. Extending analyses to the brain uncovered convergent CNS-wide aging mechanisms, including gray matter loss, decreased functional segregation, and increased spontaneous activity, highlighting shared neural aging trajectories. Together, our findings provide a systems-level view of the age-related alteration in the CNS, offering a foundation for future studies investigating potential imaging markers of sensorimotor dysfunction.