NUNZIUM

With more than 80 billion interconnected neuronal cells, the human brain is one of the yet unsolved big mysteries of science. In popular knowledge it is accepted that the brain goes through significant changes in childhood: this is supported by evident milestones such as learning to walk, speak, paint, etc… However, brain development is often commonly thought of as a process that, starting at the youngest age, reaches a mature state in young adults and only in old age - eventually - degrades by an act of diseases such as dementia or Alzheimer’s. Recent scientific research is instead pointing to a completely different understanding. The structural, functional, and metabolic changes don’t stop in the early years and continue throughout adulthood in more than one distinct phase. A “refinement phase” takes place around the third and fourth decade of life: the executive function and attention, such as the ability to think abstractly, reason, and problem-solve will peak at this point before further changing. Around the fifth decade of life, our brains start to undergo a radical "rewiring" that results in a more integrated and connected network. Older adults display reduced activity in consolidating or learning concepts, but an improved activity in associating what is already learned. Such change likely results from the necessity to function with reduced resources and aging neurons. Overall, tasks relying on predominantly known processes are less impacted by age or may even increase slightly - such as vocabulary and general knowledge. Evidence also indicated that the variability among individuals can be large: a proper diet, regular exercise, and a healthy lifestyle can keep the mind in good working order and put networking changes on hold, sometimes well into old age. Further understanding of these matters may, in the future, positively evolve our societies as currently adult individuals are considered equals - by organizational and representative organs - independently of their age.