For four weeks starting April 20, Mayo Clinic researchers were in Nepal taking physiological measurements of 10 climbers' hearts and lungs, as well as conducting sleep studies and cognitive performance tests on them.
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At least six controlled studies show that cognitive behavior therapy can improve symptoms and lessen disability somewhat.
Most of the studies compare the cognitive performances of expert gamers with those of non-gamers, and suffer from well-known pitfalls of experimental design.
Some studies have found that cognitive behavior therapy (CBT) might be an effective method to treat IUD.
Some short-term studies have found meditation can improve cognitive abilities such as attention and memory, said Dr. Doraiswamy.
And pre-specified secondary subgroup analyses of pooled data across both studies showed a statistically significant slowing of cognitive decline in patients with mild disease, but not in those with moderate disease.
Previous studies have shown that quick, insightful solutions tend to be more correct than analytic solutions (at least, for the types of tasks in the study), and other studies have shown that a positive mood enhances overall cognitive performance.
While cholinesterase inhibitors are useful in many early dementias, studies have not shown that treatment of patients with mild cognitive impairment, which is the condition before dementia, prevents or slows progression to dementia.
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Some of the studies have been highly cited and widely publicized: one, by cognitive scientists Daphne Bavelier and Shawn Green of the University of Rochester in New York, published in Nature in 2003 2, has been cited more than 650 times, and was widely reported by the media as showing that video games boost visual skills.
In Walton's studies, the intervention increased subjects' happiness, improved their health and reduced cognitive activation of negative stereotypes for several years after the initial intervention.
For the past 30 years, Dr Pepperberg, who studies parrots at Brandeis University in Massachusetts, has been producing research papers on the cognitive abilities of her African Grey, Alex, who died in September 2007 and who was the subject of an Economist obituary.
Few studies have compared exercise to drug treatment, but two randomized trials have shown that vigorous exercise combined with cognitive treatment is just as good as spinal fusion surgery, with fewer complications.
And although imaging studies show that middle-aged people may use different brain regions to do the same old tasks, cognitive tests show that apart from brute speed, the brain's abilities are not diminished in middle age.
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