Original title: Reduced Gibbs free energy supply hinders brain information processing during mental fatigue
Danko D. Georgiev, Oskan B. Tasinov, Danail V. Pavlov, Deyan S. Hrusafov · August 2026
When you think hard for a long time, your brain gets tired and processing information becomes difficult. You feel weary, and your ability to work safely and effectively drops. Researchers used data-driven computer models to find the physical root of this mental fatigue. They modeled energy moving through proteins and brain cells firing electrical signals. They found that brain fatigue starts when cells run low on Gibbs free energy, which is the usable chemical fuel released by ATP. Without enough energy, molecular wave packets called solitons become less stable inside protein structures. At the same time, the balance of sodium and potassium ions across cell membranes degrades. This ion imbalance makes neurons overly excitable and puts them at risk of depolarization block, where cells lock up and fail to fire signals properly. Taking planned breaks during hard mental work allows the brain to recover and avoid burnout.
Imagine you are trying to send a text message, but your phone battery is almost dead. The phone still works, but the screen dims, the signal weakens, and messages take longer to send or get garbled. In this paper, the brain's energy supply from ATP is like the phone battery; when it runs low, the proteins in neurons cannot transmit signals cleanly, and the brain's information processing becomes slow and error-prone.
This matters because it shows that mental fatigue is not just a feeling—it is a measurable physical change in your neurons. It explains why taking breaks during intense mental work is essential: your brain literally runs low on the energy it needs to process information efficiently. The findings support scheduling practices that allow the brain to recover, potentially preventing burnout and improving long-term productivity.
The abstract doesn't explicitly state limitations, but it notes the work is theoretical and based on computer models, so experimental validation is not provided. It does not establish how quickly fatigue sets in or how long recovery takes, and the models focus on specific molecular mechanisms that may not capture all factors contributing to mental fatigue.
Ask anything about this paper. Answers come from its abstract, and say so when the abstract doesn't cover your question.
Reduced Gibbs free energy supply hinders brain information processing during mental fatigue — Danko D. Georgiev, Oskan B. Tasinov, Danail V. Pavlov et al.
Abstract licence: CC0
Explanation generated by Synthesis from the abstract — it is not the original paper. This is a preprint, so it hasn't necessarily been peer reviewed.