Let's use rewarding deep brain stimulation to help the baby boomers exercise

September 24 2008 / by iPlant / In association with Future Blogger.net
Category: Social Issues   Year: General   Rating: 3

The baby boomers are getting older. Their pensions and healthcare will exert an enormous strain on European, north American, East Asian and Australian economies over the next few decades. Advances in medicine and medical technology continue to reduce blood-pressures, patch up hearts, extract cancers and extend life expectancy worldwide, but the brain, it turns out, does not yield to traditional methods, and effective treatments for cognitive decline and neurodegenerative diseases like Alzheimer’s remain elusive. In the US, the annual cost of care for sufferers of Alzheimer’s is expected to exceed the total current healthcare budget ($1 trillion) as 10 million baby boomers develop the disease (Nixon et al, 2008 , Alzheimer’s Association, 2008).

There is, however, one highly effective preventive treatment: heavy physical exercise cuts one’s risk of stroke and neurodegenerative disease in half (Medina, 2008). Heavy, regular physical exercise improves blood supply to the brain, eliminates free radicals and stimulates the generation of new neurons. In the coming decades, 500 billion dollars or more could thus be saved each year in the US alone if every baby boomer exercised daily. The problem of course is that exercise is difficult and people are sedentary, so sedentary in fact that we are faced with a looming obesity epidemic that compounds the problem of age-related cognitive decline. And there’s no way of using modern medicine to improve people’s motivation to engage in physical exercise, right?

Wrong. A technique called rewarding brain stimulation has for decades allowed researchers to motivate rats to run (Burgess et al, 1991), lift weights (Garner et al, 1991) and learn other behaviours (Hermer-Vasquez et al, 2005).

Here’s how it might work in people: A person needing help to exercise would go to a hospital or a private clinic to be fitted with a deep brain stimulation implant capable of activating his reward system (the dopamine system).

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