Once upon a time there was widespread belief that the human
brain was fully developed by the time a child reached five or six years old. We
know, for example, that the amygdala, the part of the brain that is responsible
for instinctual reactions such as fear and aggressive behavior, does fully
develop early. However, thanks to new technologies such as magnetic resonance
imaging (MRI), neuroscience researchers have discovered that, although 95
percent of the brain’s architecture is formed by the time a child is
six-years-old, that there are significant changes that occur around the time of
the onset of puberty, between 10 and 13 years of age.
Scientists have discovered that during adolescence there is
a rapid increase in the connections between the brain cells and refinement of
brain pathways and that these changes are critical for the development of
coordinated thought and action. As my colleague Craig Haen put it, “In the teen
years, young people are going through a software upgrade, neurologically, in
which circuitry is being consolidated, networks are being reorganized,
connections are being made stronger and more expedient and unused pathways are
wearing away.”
Changes
in the brain take place in the context of many other factors including early
childhood experiences and environment. Scientists are continuing to look into
the development of the brain and the relationship between the changes taking
place, behavior, and health.
The stakes are great during the teenage years. There is a
perplexing contradiction between adolescents reaching the peak of physical
health, strength and mental capability and, at the same time, facing greater
risks and hazards than ever before. Parents walk a fine line between supporting
their children’s independence and protecting them from harm.
Child
and adolescent brain studies affirm that the brain is hard-wired for social
interaction and for attaching and bonding with caregivers. Despite all the
scientific advances, according to leading brain researcher Jay Giedd, people might
be disappointed to know that the “best advice we can give is things that our
grandmother could have told us generations ago: to spend loving, quality time
with our children.”
Teenagers hunger for significant relationships with adults
who care about them. This belief has been validated by social scientist Ellen Galinsky,
who interviewed more than a thousand children and
found that teens longed for more time with their parents, even when they seemed
to be pushing them away. Galinsky concluded , "Even though the public
perception is about building bigger and better brains, what the research shows
is that it's the relationships, it's the connections, it's the people in
children's lives who make the biggest difference.”
If a child’s job is to explore and a parent’s job is to
protect, understanding changes in adolescent brain development offers an
opportunity to support and create environments that promote positive peer
experiences, where teens can safely explore and experiment and avoid behavior that
can harm themselves or others.
Andrew Malekoff is the
Executive Director of North Shore Child & Family Guidance Center, which
provides comprehensive mental health services for children from birth through
24 and their families. To find out more, visit www.northshorechildguidance.org.
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