Synaptic Pruning


As the brain matures, synapsis occurs, strengthening frequently used neural pathways and discarding those deemed unnecessary.  Areas of the brain become less, not more, dense as they mature after age five thanks to the “pruning” nature of synapsis.

Modern Malnutrition

Malnutrition not only affects the developing brain but compromises the child’s immune system, increasing the frequency of illness while also elongating the effects.  Causes of malnutrition vary greatly

Acute malnutrition is characterized by the loss of body fat and wasting of skeletal muscle.  Acute malnutrition is typically caused by a sudden period of food shortage while Chronic Malnutrition refers to a prolonged period of insufficient access to both macro- and micro- nutrients.  Chronic malnutrition may have devastating lifelong impacts on the body including mental functions, physical mobility and the acquisition of social skills.

Malnutrition during early life influences a child’s metabolism, inhibiting the natural progression of physiological growth and development patterns.  Children who are malnourished are at increased risk for cardiovascular and kidney diseases, developing diabetes later in life.  Malnutrition is also now considered a risk factor obesity and metabolic syndrome, characterized by the inability to properly process glucose.

Furmaga-Jablonska, W. et. al. (2014).  Malnutrition in the 21st century.  Nutrition, 30, 242-243.  Retrieved from

Malnourished Relationships

Alive & Thrive published a report in January of 2012 suggesting that malnutrition affects brain development not just directly, but also indirectly as the conditions work to  shape the child’s experiences.  While nutrient deficiencies physically affect the development of the brain, the child’s daily experience may be altered by subsequent behavioral manifestations.  Alive & Thrive asserts that undernourished children may exhibit characteristics, such as frequent illness, irritability and withdrawing that could lead caregivers to react more negatively toward them.  Essentially, behaviors caused by malnutrition may be undermining the establishment of securely attached relationships that have become indicative of strong socio-emotional skills later in life.

Alive & Thrive estimates that there are 200 million children globally failing to reach their developmental potential partially due to undernutrition.  While many studies of malnutrition focus on the extreme end of the spectrum, it is important to remember that proper nutrition is a balancing act every individual must learn how to manage.

The chart below illustrates how “interventions aimed at either the child or the caregiver may have cumulative and cascading effects over time” (p. 3).  The critical nature of the dyadic relationship between child and caregiver makes the potential interruption of attachment devastating.

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Prado, E. & Dewey, K. (2012).  Insight: Nutrition and brain development in early life (A&T Technical Brief Issue 4).  Retrieved from

The [SAD] Standard American Diet

Mark Hyman, M.D. discusses how the standard American diet has grown too energy dense but nutrient poor, rich in empty calories.  Generally, Hyman has found American’s are typically deficient in Magnesium, Vitamin C, D, E and A along with omega-3 fatty acids.

The American diet has shifted dramatically to include more processed foods stuffed with high fructose corn syrup and other refined ingredients while meats are laced with nitrates to preserve “freshness.”  Data from the USDA archives suggest that soils nutrients are becoming depleted from industrial farming.  Comparisons of 43 fruits and veggies from 1950 and 1999 show calcium down 16%, iron 15% and vitamin C 20%.  Larger, less nutritious portions have become less expensive than the food our grandparents once grocery shopped for.

Hyman, M. M.D. (2012 March 8).  How malnutrition causes obesity [Blog Post].  Retrieved from

Intriguing Correlations between Scores/Behavior and Parental Income

Katherine Magnuson examines the “causal role of low family income in early childhood for subsequent outcomes during the school year and later in life, including adulthood”

The top row of graphs depicts student standardized test scores by parental income.  The second row of graphs illustrates student behaviors (as reported by teachers).  Quintile 5 have parents with the highest incomes (the top 20% of the income distribution).


Magnuson, K. (2013).  Reducing the effects of poverty through early childhood interventions.  Fast Focus.  Retrieved from