Cognitive cost as dynamic allocation of energetic resources.
Level 5 - mechanism / opinion, no new human data
Theoretical model and mechanistic reasoning without new empirical human data.
PubMed 26379482 · doi:10.3389/fnins.2015.00289
What was done
The authors developed a control-theoretic computational model of cognitive cost based on the premise that the brain actively regulates and conserves metabolic resources. The model incorporates astrocytic glycogen as a limited physiological energy buffer supporting neural activity beyond blood glucose supply rates to simulate decision-making under an energetic budget.
What was found
No empirical numbers or quantitative trial results are reported in the abstract. Conceptually, the model accounts for cognitive effort avoidance via optimal energetic allocation, while reproducing known patterns of reward responsiveness and the negative cognitive effects of hypoglycemia.
Why it matters
The work bridges opportunity-cost and physiological limited-resource theories of mental fatigue, offering a unified metabolic mechanism for cognitive control, working memory limits, and attention.
Limits
This is a theoretical modeling paper containing no new human experimental data. The proposed role of astrocytic glycogen depletion as the primary driver of cognitive effort avoidance relies on theoretical synthesis rather than direct empirical validation within the study.
Cited by
- supports Every decision carries a metabolic cost requiring the brain to invest energy to make that decision.