Like a SWAT team tracking escaped
convicts, scientists investigating the damage that poverty inflicts on children
are utilizing forensics to close in on the culprit.
New research
more strongly links poverty, brain development and reduced academic
achievement. In April I wrote about the
ravages of inequality on America’s children, as evident in correlations between
low income and smaller brain size. See @
http://www.huffingtonpost.com/billy-shore/-smaller-bank-accounts-sm_b_7151794.html On July 20, a team led by University of
Wisconsin-Madison’s Seth Pollak published findings in JAMA Pediatrics (Journal
of the American Medical Association) that went farther than before.
Analyzing MRI
scans of 389 children and teens over six years; they found that poverty
affected the structure of three parts of the brain related specifically to
academic achievement: the frontal lobe, the temporal lobe, and the hippocampus.
15-20% of the gap in test scores between low income and upper income kids can
be explained by structural differences in those three parts of the brain. Kids
living in families below the poverty level had 8-10% less gray matter in the
regions of the brain associated with learning and scored 4-7 points lower on
standardized tests.
The new
study is the first to connect these findings. "Our
research suggests that specific brain structures tied to processes critical for
learning and educational functioning (e.g., sustained attention, planning, and
cognitive flexibility) are vulnerable to the environmental circumstances of
poverty, such as stress and limited stimulation and nutrition," the
authors note. "It was stunning to see the circle closed—the delay
in brain growth explains the achievement deficit in poor children," says
Pollak.
The “aha!” is
not so much the correlation but the granularity and specificity of imaging that
makes such correlations irrefutable, and harder to look the other way.
When it comes to poverty, our national
Achilles’ heel is the habit of “out of sight, is out of mind.” Brain size is a microcosm for it. Talk about
invisible! If not for neuro-science we
would never know that specific damage that hunger and poverty inflict. Until
now we never had an unobstructed view. Instead we had to speculate, surmise,
make a leap of faith. Graphing MRI’s to income and test scores makes what is
fuzzy more sharp and clear.
Nature gave us all hard skulls, just not hard enough to protect what’s
inside from politics, bureaucracy, indifference and neglect. But the good news, as JAMA said in an
editorial, is that the sensitivity of the brain (what scientists call
“plasticity”) to positive as well as negative “lends credence to the idea that
interventions to remediate adverse early environments may have some success in
altering this neurobiological tie.”
These
discoveries add urgency to everything we do.
It puts Share Our Strength on the front lines not only of feeding kids
but also increasing educational opportunity. Whether you are working on our
Hunger Free Summer for Kids legislation, Dine Out, corporate partners,
innovation, culinary, Cooking Matters, or other vital relationships, it’s more
clear than ever that a generation of children across the country depend on your
efforts.