The spinal cord is critical to motor, sensory, autonomic function, and increasingly implicated in neurological disease and human health, yet its genetic architecture remains largely unexplored. We perform large-scale phenotyping of the upper cervical spinal cord (C1-C3) structure using brain magnetic resonance imaging from over 80,000 UK Biobank participants, extracting shape metrics including cross-sectional area, diameters, and eccentricity. We identify a total of 179 independent genome-wide…
