Your brain builds its own 'express lanes' for signals to save energy, acting just like a city’s subway system.
March 23, 2026
Original Paper
Multimodal branched transport infers anatomically aligned brain reaction maps
arXiv · 2603.19761
The Takeaway
Using mathematical optimization, researchers found that the brain doesn't just send information directly from one point to another. Instead, it bundles different signals into shared paths to maximize efficiency, creating a branched routing architecture that explains how a single stimulus can trigger a complex, distributed reaction.
From the abstract
How external stimulation is transformed into distributed reaction patterns remains unresolved at the level of propagation architecture. Existing large-scale control models quantify transition costs on prescribed networks but do not infer the routing map itself from source and target activity. Here we combine task-related blood-oxygen-level-dependent responses, source-reconstructed electrophysiology and tractography-derived anisotropy to estimate stimulation and reaction measures, define an anato