Is brain elasticity an objectively scientific thing? Can it be measured? It seems like an invention to fit observed mental rigidness with age.
It is observed in adults as well as children, but there is definite decay in that ability.
By 'observed', neuroplasticity has been observed at the microscopic level, as well as higher levels, such as brain remapping of function following injury.
https://futurism.com/fountain-youth-effect-young-blood-old-m...