Abstract
Behavioural environment and behavioural responses of an individual are known to affect multiple aspects of physiology including neuroendocrine and growth factor signalling, angiogenesis, stem cell dynamics, tissue homeostasis, and maintenance. Despite substantial evidence, the role of behaviour-physiology interface in human health and disease remains underappreciated. The hypothesis proposed here suggests that deficiencies of certain behaviours that have evolved to become essential or “vitactions” can potentially trigger multiple health problems. Altered growth factor expression because of vitaction deficiencies affects angiogenesis and vascular function, neuronal maintenance, transport of glucose and other nutrients to the brain, mitochondrial function, oxidative stress, inflammation, and protein aggregation dynamics all implicated in Alzheimer’s disease (AD). Exercise is already known to be effective in prevention of AD. The hypothesis suggests that it is the behavioural component of exercise over mechanical activity and calorie burning that has crucial effects on brain health through multiple signalling pathways. Similar to vitamin deficiencies, where supplying the deficient vitamin is the only effective solution, for vitaction deficiencies supplying the deficient behavioural stimuli through behaviourally enriched exercise can be the most effective remedy.
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