Ages and Stages

Austrian novelist Marie von Ebner-Eschenbach defined aging: “In youth we learn; in age we understand.” I am rethinking what age means on my birthday.

We know 4 aging stages of monarch butterflies: egg, larva (caterpillar), pupa (chrysalis), and adult. This amazing metamorphosis includes caterpillars whizzing through 5 growth spurts, molting skin each time! This reminds me of adolescents making change after change with dizzying speed.

Research from University of Cambridge suggests that adolescence lasts longer than you ever thought. Dr Alexa Mousley and her colleagues found that the brain stays in the adolescent stage until the early 30’s. Key maturation is determined to end around age 32. Studying nearly 4000 individuals’ MRI scans (ages 0-90 years), the researchers concluded that there are 4 pivotal ages for brain turning points or major changes: 9, 32, 66, and 83.

•  Childhood — Birth to age 9: Brains undergo network consolidation with the most active synapses preserved from a whittling-down process. There is a major boost in cognitive capacity, but also a risk of mental health challenges.
•  Adolescence – Ages 9 to 32: Brains’ largest directional changes have an efficiency of connections within specific brain regions. There is rapid communication across the whole brain which relates to enhanced cognitive performance. However, this timeframe poses the greatest risk for mental health disorders. Many individuals initiate substance use in this stage. Repeated drug exposure can significantly alter brain development, especially relating to the ways reward and control circuits are wired. A drug habit may become almost automatic, leading to a reduction in prefrontal problem-solving which has many consequences.
•  Adulthood – Ages 32 to 66: A “plateau in intelligence and personality” (based upon other research) was sustained in this research. Brain functioning appears relatively stable.
•  Early aging – Ages 66 to 83: A mild and gradual reorganization of brain networks culminates in the mid-60’s, although a variety of health conditions (hypertension or diabetes, for example) may emerge; health issues can place an individual at risk for cognitive decline.
•  Late aging – Age 83+: Whole brain connectivity reduces and there is more reliance on specific brain regions. However, this participant group was smaller than the other stages studied and merits more study.

The researchers admit their participants were controlled for “healthy” folks. Trauma affects brain ages/stages. An estimated 6 in 10 U.S. adults have experienced trauma (with higher numbers among women than men). Rates for children and adolescents are higher: according to the National Library of Medicine, about 2 out of 3 U.S. individuals experience trauma by age 16. This rate is likely higher among youth in violent war areas around the globe. We need a planetary plan for addressing trauma.  

How do butterflies deal with trauma? According to the Australian Butterfly Sanctuary, butterfly wings are larger than needed for flying. Butterflies can fly with half of their wings missing. My translation for “youth” at any age: keep flying (learning)!

Pearls of Peace (PoP) Quiz

460. What does your age mean to you?

461. What health-proofing practices do you use?