Brain activity reveals how people juggle changing goals in real time
Nature never sits still, and neither does anything living within it, since paths keep shifting as things move through the world. Decisions work the same way, changing shape as we go rather than settling once and for all. You set out on a certain route to the office, then traffic forces you onto another, or you plan to cook a certain meal, then realize you're missing an ingredient and end up…
Our brains are not static; they continuously adapt to shifting situations. Researchers aimed to understand how the human brain makes decisions in real-time as circumstances change. In a study published in Nature, scientists examined behavior and brain activity while participants played a video game where they had to chase virtual prey that moved unpredictably.
The task involved a joystick, and prey targets had varying speeds, values, and colors, determined by an algorithm. Participants included 50 healthy adults and 19 epilepsy patients undergoing brain monitoring.
Decision-making in this dynamic environment relied on a trio of brain regions working together. The hippocampus tracked and updated the current plan during early planning. The anterior cingulate cortex, located in the left hemisphere, evaluated when to alter strategies. Meanwhile, the orbitofrontal cortex supplied information on the value of the situation. Traditional neuroscience studies often treated decision-making as a singular event, but this study revealed that real-life decisions fluctuate constantly.
Participants were observed spending 36% to 41% of the time in a blended state, switching their focus between high- and low-value targets continuously. This blended approach, which ran two separate movement plans simultaneously and blended them, proved more effective than a winner-take-all strategy where players focused entirely on one target. No significant difference was found between the control and patient groups in their decision-making strategies.
These findings demonstrate how decisions in real-world situations shift from one moment to the next, with competing goals pulling behavior in different directions. Future research could explore how this framework applies to more goals, increased uncertainty, or multiple individuals involved. Understanding how decisions unfold could ultimately lead to the development of robots and AI systems capable of better dynamic decision-making.
Written by urgent.news from Medical Xpress's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
