First-of-its-kind study brain map shows how decisions are made

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🗞️ Driving the news: In a landmark achievement for neuroscience, an international team of researchers has created the most comprehensive brain map to date, showing how decisions unfold across nearly the entire brain
• The seven-year effort tracked over 600,000 neurons in 139 mice using advanced Neuropixels probes, offering an unprecedented view of the decision-making process across 279 brain regions

🔭 The context: Previous studies focused on isolated brain regions, typically capturing activity from small clusters of neurons
• The new dataset—spanning 95% of the mouse brain—reveals that decision-making is a whole-brain process, with electrical signals initiating in visual-processing areas and spreading to motor and reward-related regions
• This work was coordinated by the International Brain Laboratory, involving 22 labs in a rare collaborative model for biological research

🌍 Why it matters for the planet: This foundational map enhances understanding of how brains integrate perception, memory, and movement — crucial insights for advancing mental health treatment, artificial intelligence, and brain-machine interfaces
• By revealing the full complexity of neural decision-making, it also challenges reductionist views of cognition and supports more holistic approaches in neuroscience and biomedical innovation

⏭️ What's next: The dataset is expected to serve as a reference point for future research on neurological disorders, cognition, and behavior
• It opens the door to large-scale, collaborative brain mapping projects in other species, including humans
• Researchers hope the project sets a new standard for data-sharing and scientific coordination in the life sciences

💬 One quote: “We went from looking at just a few hundred neurons in one area to 600,000 neurons in all brain regions.” – Alexandre Pouget, coauthor and professor of neuroscience at the University of Geneva

📈 One stat: The project mapped activity in over 600,000 neurons across 279 brain regions, covering 95% of the mouse brain during decision-making tasks

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