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Washington [US], April 25 : Researchers recently examined the relationships between three variablesnutrient intake, brain anatomy, and cognitive functionthat have been shown to independently predict healthy ageing. Their research strengthens the case that these elements work together to support older persons' brain health.The study, which was published in the Journal of Nutrition, discovered a correlation between blood levels of two saturated fatty acids, as well as specific omega-6, -7, and -9 fatty acids, and improved memory tests as well as larger frontal, temporal, parietal, and insular cortices in the brain. View a video describing the study.While other studies have found one-to-one associations between individual nutrients or classes of nutrients and specific brain regions or functions, very little research takes a comprehensive look at brain health, cognition and broad dietary patterns overall, said Aron Barbey, a professor of psychology, bioengineering and neuroscience at the University of Illinois Urbana-Champaign who led the study with postdoctoral researcher Tanveer Talukdar and psychology research scientist Chris Zwilling. The three co-authors all are affiliated with the Beckman Institute for Advanced Science and Technology at the U. of I."Our findings reveal that we can use nutrient biomarkers, cognitive tests and MRI measures of brain structure to account for much of the variation in healthy aging," Barbey said. "This allows us to better understand how nutrition contributes to health, aging and disease,"The researchers collected data from 111 healthy older adults with MRI structural scans, blood-based biomarkers of 52 dietary nutrients and cognitive performance on tests of memory and intelligence. By combining these measures using a data-fusion approach, the team found associations between dozens of features that appear to work in tandem to promote brain and cognitive health in older adults.Data-fusion allows researchers to look across multiple data sets to map traits or features that have common patterns of variability, said Talukdar, who tailored this method to incorporate the nutrition, cognition and brain volumetric data."We're looking at relationships among all of these together," he said. "This allows us to identify certain features that cluster together."This overcomes some of the limitations of analyzing individual factors, Barbey said."If we just look at nutrition as it relates to brain structures and we don't study cognition, or if we look at nutrition as it relates to cognition and we don't study the brain, then we're actually missing really important pieces of information."The most obvious features that clustered together in the new analysis involved the size of gray-matter volumes in the frontal, temporal and parietal cortices; performance on tests of auditory memory and short- and long-term memory; and blood markers related to consumption of monounsaturated and polyunsaturated fatty acids. Study participants who scored higher on the memory tests tended to have larger gray-matter volumes and higher levels of markers of omega-6, -7 and -9 fatty acids in their blood. Those who did more poorly on the cognitive tests also had smaller gray-matter volumes in those brain regions and lower levels of those dietary markers, the analysis revealed.While the study only reveals associations between these factors and does not prove that dietary habits directly promote brain health, it adds to the evidence that nutrition is a key player in healthy aging, the researchers said."Our work motivates a more comprehensive picture of healthy aging," Zwilling said. This gives insight into the importance of diet and nutrition and the value of data-fusion methods for studying their contributions to adult development and the neuroscience of aging."Disclaimer: This post has been auto-published from an agency feed without any modifications to the text and has not been reviewed by an editor

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Health :Researchers reveal how nutrients, brain structure, cognition linked to healthy aging

Washington [US], April 25 : Researchers recently examined the relationships between three variablesnutrient intake, brain anatomy, and cognitive functionthat ... ...