Your brain has a literal high-speed 'HOV lane' just for making instant, split-second judgments about the people you meet.
April 13, 2026
Original Paper
The Fast Lane Hypothesis: Von Economo Neurons Implement a Biological Speed-Accuracy Tradeoff
arXiv · 2604.09229
The Takeaway
Von Economo neurons are rare cells found only in smart, social animals like humans and whales. This research shows they sacrifice detail for speed, explaining why we can read a room instantly but sometimes get it wrong.
From the abstract
Von Economo neurons (VENs) are large bipolar projection neurons found exclusively in the anterior cingulate cortex (ACC) and frontal insula of species with complex social cognition, including humans, great apes, and cetaceans. Their selective depletion in frontotemporal dementia (FTD) and altered development in autism implicate them in rapid social decision-making, yet no computational model of VEN function has previously existed. We introduce the Fast Lane Hypothesis: VENs implement a biologica