Posts Tagged ‘Kenneth Langa’

Defying Dementia

May 4, 2017

This post is based in part on posts by Kayt Sukel with the title Defying Dementia in the Features Section of 29 April 2017 issue the New Scientist.  Katy Sukel begins, “DEMENTIA isn’t inevitable.  The human brain can stay sharp well past 100 years of life.  The brain does slow down.  (See the healthy memory blog post, “The Myth of Cognitive Decline.”)  One of the primary reasons it slows down is that it has accumulated massive amounts of data as a function of age.  And the greater the learning the greater the volume.  In addition, parts of the brain associated with memory and executive function shrink, myelin sheath around our neurons starts to erode, slowing down signaling, and arteries narrow, diminishing blood supply.  But these factors mainly affect speed.  When healthy older people are given extra time to perform cognitive tasks, the results are on par with younger folks.

When it occurs, dementia does alter the cognitive playing field.  In addition to memory, it causes issues with understanding or expressing oneself in language, problems with sensory perception, and disturbances in executive function.

The number of people with dementia might be rising, but most specialists say that is largely because more of us are living longer.  Between 1980 and 2011, the proportion of people over 65 with dementia actually dropped by 20% in England and Wales.   Between 2000 and 2012, dementia rates in that age group dropped by 24% in the US.

Kenneth Langa of the Michigan Center on the Demography of Aging said that there are two driving factors for this change:  A rise in educational attainment and better control of cardiovascular issues.  After the second world war, there was an increase in schooling that averaged out to about an extra year of education across the US population.   Research suggests that people with more education, or those who have done things like learning a new language or learning to play a musical instrument are more resilient to symptoms of dementia.  Langa says, “By challenging your brain during education, you create a more fit brain that can compensate for problems that you have as you age.  It creates a cognitive reserve that boosts the brain’s ability to work around damaged areas, and promotes more efficient processing.  As far as cardiovascular risk factors are concerned, although the prevalence of conditions such as high blood pressure and diabetes as risen over the years, there also has been an increase in treatments to limit their damage.

Although there clearly are genetic factors, they tend to increase the probability of Alzheimer’s. There are no genes that directly lead to Alzheimer’s.  So, rather than be concerned about genetics, deal with lifestyle and genetic factors.  Maintaining social connections, eating a healthy diet, exercising regularly, practicing good sleep habits, and pursuing intellectual changes lead to a healthy memory.

Arthur Kramer of the University of Illinois at Urbana-Champaign says that regular exercise not only addresses risk factors such as weight and cardiovascular health, but it also increases the creation of brain cells, connections between neurons, and production of nerve growth factors and neurotransmitters.  Dr. Kramer’s research has shown that just an hour long walk a few times a week increases hippocampal growth, and certainly can make a difference.

Healthymemory blog readers should also be aware of the importance of a growth mindset and of the benefits of meditation and mindfulness.  In addition to defying dementia, they provide for a more fulfilling life.

© Douglas Griffith and healthymemory.wordpress.com, 2017. Unauthorized use and/or duplication of this material without express and written permission from this blog’s author and/or owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Douglas Griffith and healthymemory.wordpress.com with appropriate and specific direction to the original content.

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