Brain size, body size and longevity

In this analysis, we bring together two research fields that have never been associated before: the clinical issue Quételet's body-mass index and longevity and the comparative biological issue body-brain allometry. Comparison of medical and biological data supports the view that body mass index is just a one-to-one mapping of the body-brain-energy balancea biological variable indicating that an individual maintains its systemic energy homeostasis and therefore is likely to perform well in the coming years.