23. February 2010 by John Schinnerer.

A new study from my alma mater, University of California at Berkeley, shows that a one-hour nap can significantly restore your mental capacity, make you more intelligent and clears out old information to make way for new learning.

On the other side of the coin, the longer you go without sleep, the more we lose mental clarity and become increasingly foggy.  As any new parent knows, interrupted sleep makes one grouchy, irritable, and what’s more, poor sleep makes one less able to concentrate effectively.

When I was in college, I had classmates that would pull all-nighters to cram for finals. I never pulled an all-nighter,  partly because I just couldn’t operate the next day without sleep. The study from UC Berkeley showed a marked difference in the learning ability of students who pulled an all-nighter versus those who got their z’s in. Remarkably, those students who studied all night without sleep showed a 40% decline in their ability to learn new facts due to a shutdown in their hippocampus, a brain area associated with fact-based learning.

The hypothesis which is gaining support from research is that the hippocampus eventually becomes overloaded and sleep gives it a chance to empty itself out, similar to deleting your junk mail  folder in Outlook. Space is freed up so it can be used in new, more constructive ways.

For more information and the full article, please click here.

Have an incredible week!

John Schinnerer, Ph.D.

Positive Psychology Coach

Bay Area, California

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6. October 2009 by John Schinnerer.

October 5th, 2009  PhysOrg.com

‘Scientists have long struggled to understand the body’s biological clock. Its tick-tock wakes us up, reminds us to eat and tells us when to go to bed. But what sets that circadian rhythm?

New research now shows that daily fluctuations in powerful hormones called glucocorticoids directly synchronize the biological clock as an integral part of our mechanism for regulating blood sugar.

“The most surprising part of our findings is that our internal biologic rhythms are embedded directly into another pathway, one that is essential to regulate metabolism,” said senior study author Brian Feldman, MD, PhD, assistant professor of pediatric endocrinology at the Stanford University School of Medicine. Feldman also practices at Lucile Packard Children’s Hospital.

The new findings give the first in vivo evidence of a direct link between glucocorticoid hormones and genes that regulate our biological clock. The research may eventually help doctors reduce disabling side effects of glucocorticoid drugs such as prednisone, Feldman said. The work could also help diabetics control their blood sugar levels and may shed light on why night-shift workers are at risk for obesity and diabetes.

The study will be published online Oct. 5 in Proceedings of the National Academy of Sciences. Feldman worked previously at the University of California-San Francisco, where much of the research was conducted.

The result shows that blood sugar regulation and the biological clock are closely entwined.

The close link between daily cycles of glucocorticoids, the body’s daily rhythms and blood sugar fluctuations should prompt doctors to examine how they use glucocorticoid drugs, Feldman said. For instance, prednisone is a powerful immune-suppressing glucocorticoid used to treat everything from severe asthma to cancer. Unfortunately, its side effects include poor regulation of blood sugar, weight gain and diabetes.

“Some very simple modifications in how we use glucocorticoids may change whether these drugs cause diabetes,” Feldman said. Giving prednisone in a daily pattern that matches the body’s natural glucocorticoid cycle — with a daily peak in the early morning — might help solve the problem, he said. And because prednisone is already approved for human use, clinical trials of this idea would be fast and simple.

Feldman’s findings might also be applied to aid people who already have diabetes, possibly making it easier for them to artificially control their blood sugar with medications. And the work provides the beginnings of a concrete explanation for the down side of night-shift work.

“We know that disturbed sleep patterns predispose people to metabolic syndrome,’ or a combination of obesity and elevated diabetes risk, Feldman said. ‘But our molecular understanding has been poor. Now we’re fleshing out the beginnings of those molecular details.’

Source: Stanford University Medical Center (news : web)

 For full article click here.

Have a happy day!

John Schinnerer, Ph.D.

Positive Psychologist

Danville CA 94526

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