The physiological and psychological ability to sustain focused attention and high-level cognitive function over extended periods without significant degradation in performance. This capacity is fundamentally linked to the brain’s energy metabolism, its resilience to fatigue-inducing neurotransmitter depletion, and effective stress hormone regulation. High capacity is a hallmark of robust neuroendocrine health. Diminished capacity often correlates with HPA axis dysregulation.
Origin
This term draws from the fields of sports psychology and cognitive neuroscience, translating the concept of physical endurance to the domain of mental workload. In hormonal health, it specifically addresses the endocrine underpinnings of sustained cognitive effort. The capacity is viewed as a dynamic, trainable resource influenced by systemic factors.
Mechanism
The underlying mechanism relies heavily on stable cerebral glucose utilization and efficient mitochondrial function within glial cells and neurons. The HPA axis plays a critical regulatory role, as chronic, unmanaged stress leads to cortisol dysregulation that depletes neurotransmitter reserves and impairs executive function. Optimized thyroid and adrenal function ensures a steady supply of energy and regulatory support for prolonged mental tasks.
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