According to
Sheryl Feinstein, author of Inside the
Teenage Brain: Parenting a Work in Progress, just as adolescents may go through an awkward
growth spurt, new cognitive skills and competencies may come in leaps and
stutters. No matter how tall they have grown or how grown-up they try to dress,
the teenage brain is still in a developmental period that will affect the rest
of their life. It is possible to survive this; most parents have. Scientists
used to think that it was only babies who had an overabundance of neuronal
connections, which are pruned into a
more efficient arrangement over the first three years of life. Not so. Brain imaging
studies, such as one published in 1999 in Nature Neuroscience, have shown that
a second burst of neuronal sprouting happens right before puberty, peaking at
about age eleven for girls and twelve for boys. Again there will be a pruning
and shaping of this new gray matter, shaped by the adolescent's
experiences. Loosely following a ‘use it or lose it’ strategy, the structural
reorganization is thought to continue until age twenty-five, with smaller
changes continue throughout life. Part 3 tomorrow.
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