{
  "id": 2205243,
  "title": "Submillimeter MRI reveals brain hubs that guide risky decisions",
  "url": "https://urgent.news/2026/08/20/submillimeter-mri-reveals-brain-hubs-that-guide-risky-decisions",
  "topic": "science",
  "section": "Science",
  "published": "2026-08-20T19:20:04.000Z",
  "source": {
    "name": "Medical Xpress",
    "slug": "medical-xpress",
    "url": "https://medicalxpress.com/news/2026-08-submillimeter-mri-reveals-brain-hubs.html"
  },
  "original_language": "en",
  "account": "A groundbreaking study published in Nature Communications has revealed submillimeter brain regions that guide risky decision-making. Researchers from National Taiwan University and the University of Illinois at Urbana-Champaign used a 7-Tesla MRI scanner to capture detailed images of the brain during a decision-making task, allowing them to observe functional activity in structures just a few millimeters across. The study found that when faced with high-stakes decisions, the locus coeruleus brainstem structure signaled the frontal cortex to allocate more neural resources to the decision. Within the frontal cortex, neural activity shifted between deeper layers during choice formulation and superficial layers during outcome evaluation. The study also identified novel functional roles for gray matter bridges - 1 mm wide structures spanning the striatum - which acted as information gates for faster decisions. These findings offer critical insights into the neural circuits that govern human choice behavior and could help identify individual vulnerabilities to maladaptive decision-making due to age-related neurodegeneration or neurological conditions.",
  "summary": "Imagine that a notification on your financial app captures your attention about a stock projected to have a 68% chance of doubling your investment within a month, with a 32% chance of total loss. Would you commit a $50,000 stake? Would your decision change if the odds of gain rose to 99-to-1, or if the stake dropped to $1,000? Even after your decision, you would likely track the stock outcome to…",
  "key_points": [
    "Submillimeter brain regions guide risky decisions",
    "Locus coeruleus signals frontal cortex for high-stakes choices",
    "Gray matter bridges act as information gates for faster decisions"
  ],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}