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      The Four Pillars of Alzheimer’s Prevention

      research-article
      Author(s): , M.D.,   , Ph.D.
      Publication date (Electronic):
      Journal: Cerebrum: the Dana Forum on Brain Science
      Publisher: The Dana Foundation

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          Editor’s Note:

          Much is yet to be discovered about the precise biological changes that cause Alzheimer’s, disease, why it progresses more quickly in some than in others, and how the disease can be prevented, slowed, or stopped. And while researchers continue to search for the magic pill that can prevent or halt the spread of amyloid in the brain, our authors believe that changing or modifying one’s lifestyle and attitude can make a difference in both prevention and treatment .

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          A pilot study of yogic meditation for family dementia caregivers with depressive symptoms: effects on mental health, cognition, and telomerase activity.

          H Lavretsky, E.S. Epel, P. Siddarth … (2013)
          This study examined the effects of brief daily yogic meditation on mental health, cognitive functioning, and immune cell telomerase activity in family dementia caregivers with mild depressive symptoms. Thirty-nine family dementia caregivers (mean age 60.3 years old (SD = 10.2)) were randomized to practicing Kirtan Kriya or listening to relaxation music for 12 min per day for 8 weeks. The severity of depressive symptoms, mental and cognitive functioning were assessed at baseline and follow-up. Telomerase activity in peripheral blood mononuclear cells (PMBC) was examined in peripheral PBMC pre-intervention and post-intervention. The meditation group showed significantly lower levels of depressive symptoms and greater improvement in mental health and cognitive functioning compared with the relaxation group. In the meditation group, 65.2% showed 50% improvement on the Hamilton Depression Rating scale and 52% of the participants showed 50% improvement on the Mental Health Composite Summary score of the Short Form-36 scale compared with 31.2% and 19%, respectively, in the relaxation group (p < 0.05). The meditation group showed 43% improvement in telomerase activity compared with 3.7% in the relaxation group (p = 0.05). This pilot study found that brief daily meditation practices by family dementia caregivers can lead to improved mental and cognitive functioning and lower levels of depressive symptoms. This improvement is accompanied by an increase in telomerase activity suggesting improvement in stress-induced cellular aging. These results need to be confirmed in a larger sample. Copyright © 2012 John Wiley & Sons, Ltd.
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            Superior memory and higher cortical volumes in unusually successful cognitive aging.

            Theresa Harrison, Sandra Weintraub, M-Marsel Mesulam … (2012)
            It is "normal" for old age to be associated with gradual decline in memory and brain mass. However, there are anecdotal reports of individuals who seem immune to age-related memory impairment, but these individuals have not been studied systematically. This study sought to establish that such cognitive SuperAgers exist and to determine if they were also resistant to age-related loss of cortical brain volume. SuperAgers were defined as individuals over age 80 with episodic memory performance at least as good as normative values for 50- to 65-year-olds. Cortical morphometry of the SuperAgers was compared to two cognitively normal cohorts: age-matched elderly and 50- to 65-year-olds. The SuperAgers' cerebral cortex was significantly thicker than their healthy age-matched peers and displayed no atrophy compared to the 50- to 65-year-old healthy group. Unexpectedly, a region of left anterior cingulate cortex was significantly thicker in the SuperAgers than in both elderly and middle-aged controls. Our findings identify cognitive and neuroanatomical features of a cohort that appears to resist average age-related changes of memory capacity and cortical volume. A better understanding of the underlying factors promoting this potential trajectory of unusually successful aging may provide insight for preventing age-related cognitive impairments or the more severe changes associated with Alzheimer's disease.
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              Meditation effects on cognitive function and cerebral blood flow in subjects with memory loss: a preliminary study.

              Sahib Khalsa, S Waldman, Nancy Wintering … (2009)
              This preliminary study determined if subjects with memory loss problems demonstrate changes in memory and cerebral blood flow (CBF) after a simple 8-week meditation program. Fourteen subjects with memory problems had an IV inserted and were injected with 250 MBq of Tc-99m ECD while listening to a neutral stimulus CD. They then underwent a pre-program baseline SPECT scan. Then subjects were guided through their first meditation session with a CD, during which they received an injection of 925 MBq ECD, and underwent a pre-program meditation scan. Subjects completed an 8-week meditation program and underwent the same scanning protocol resulting in a post-program baseline and meditation scan. A region of interest (ROI) template obtained counts in each ROI normalized to whole brain to provide a CBF ratio. Baseline and meditation scans and neuropsychological testing were compared before and after the program. The meditation program resulted in significant increases (p< 0.05) in baseline CBF ratios in the prefrontal, superior frontal, and superior parietal cortices. Scores on neuropsychological tests of verbal fluency, Trails B, and logical memory showed improvements after training. This preliminary study evaluated whether an 8-week meditation program resulted in improvements in neuropsychological function and differences in CBF in subjects with memory loss. While the findings are encouraging, there are a number of limitations that can be addressed in future studies with more participants and more detailed analyses.
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                Author and article information

                Journal
                Journal ID (nlm-ta): Cerebrum
                Journal ID (iso-abbrev): Cerebrum
                Title: Cerebrum: the Dana Forum on Brain Science
                Publisher: The Dana Foundation
                ISSN (Print): 1524-6205
                ISSN (Electronic): 1943-3859
                Publication date Collection: Mar-Apr 2017
                Publication date (Electronic): 01 March 2017
                Volume: 2017
                Electronic Location Identifier: cer-03-17
                Article
                Publisher ID: cer-03-17
                PMC ID: 5501038
                SO-VID: 87d9eefc-345c-4753-8cfa-8bf9ac5f836c
                Copyright © Copyright 2017 The Dana Foundation All Rights Reserved
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