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Researchers Discover Genetic Cause For Primary Biliary Cirrhosis
Researchers have discovered a novel molecular path that predisposes patients to develop primary biliary cirrhosis, a disease that mainly affects women and slowly destroys their livers. Primary biliary cirrhosis has no known cause.
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Variants Of 'Umami' Taste Receptor Contribute To Our Individualized Flavor Worlds
Using a combination of sensory, genetic, and in vitro approaches, researchers from the Monell Center confirm that the T1R1-T1R3 taste receptor plays a role in human umami (amino acid) taste.
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Lyme Disease Is Spreading In Canada, And Physicians Are Crucial In Helping Minimize Its Impact
Lyme disease is emerging in Canada, and is expected to increase with climate change, but effective, enhanced surveillance and clinician awareness will be key to minimizing the impact of the disease, write researchers in a review in CMAJ .
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Sleep Deprivation Affects Older Adults Less Than Younger Adults During Cognitive Performance

According to a research abstract that will be presented on Wednesday, June 10, at SLEEP 2009, the 23rd Annual Meeting of the Associated Professional Sleep Societies, older adults are able to retain better cognitive functioning during sleep deprivation than young adults. Results indicate that older adults (ages 59 through 82 years) showed more resiliency to total sleep deprivation (TSD) than young adults (ages 19 to 38 years) on a range of measures of cognitive performance, including working memory, selective attention/inhibition and verbal encoding and retrieval. Performance of young adults significantly declined on all three tasks during TSD while that of older adults did not change significantly. According to principal investigator Sean Drummond, PhD, at the UCSD/VA healthcare system in San Diego, Calif., older adults may have performed better because only very healthy people were included from that age group, which may have caused a selection bias that does not exist in younger adults. "It may be that older adults who remain the healthiest late in life are less vulnerable to a variety of stressors, not just sleep loss," said Drummond. The study included 33 older adults and 27 younger adults. The performance of older and younger adults was compared on three distinct cognitive tasks before and after 36 hours of sleep deprivation. According to Drummond, sacrificing sleep to study or work is a false-trade off; findings of this study and many others show that sleep deprivation produces impaired performances across a variety of different tests. Abstract Title: Older Adults are Less Vulnerable to Sleep Deprivation than Younger Adults during Cognitive Performance Presentation Date: Wednesday, June 10 Category: Sleep Deprivation Abstract ID: 0420 Kelly Wagner American Academy of Sleep Medicine


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