A descriptive term for the capacity of the central nervous system to process complex information, maintain focus, and rapidly switch cognitive tasks without experiencing mental fatigue or system overload. Functionally, it reflects the efficiency of neuronal communication pathways and the availability of metabolic resources for high-level cognition. Low bandwidth often correlates with chronic inflammatory states or suboptimal neurotransmitter availability. We evaluate this capacity through measures of executive function.
Origin
Borrowed directly from information technology, where bandwidth describes data transfer capacity, this term analogizes neuronal processing power. In the context of wellness science, it emphasizes the finite nature of cognitive resources that must be managed. This metaphor helps explain why systemic stressors deplete mental reserves.
Mechanism
Brain bandwidth is supported by adequate cerebral blood flow, efficient glucose or ketone utilization by astrocytes and neurons, and sufficient phospholipid integrity for synaptic vesicle function. Hormonal balance, especially adequate thyroid hormone signaling, is necessary for maintaining baseline metabolic rate within the CNS. Furthermore, minimizing excitotoxicity preserves the structural integrity required for high-speed signal transmission.
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