scholarly journals Effects of Nutrition on Cognitive Function in Adults with or without Cognitive Impairment: A Systematic Review of Randomized Controlled Clinical Trials

Nutrients ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 3728
Author(s):  
Laia Gutierrez ◽  
Alexandre Folch ◽  
Melina Rojas ◽  
José Luis Cantero ◽  
Mercedes Atienza ◽  
...  
Keyword(s):  
Cognitive Impairment ◽  
Cognitive Function ◽  
Dietary Supplements ◽  
Specific Protein ◽  
Dietary Interventions ◽  
Dietary Counseling ◽  
Randomized Controlled Clinical Trials ◽  
Randomized Controlled ◽  
The Impact

New dietary approaches for the prevention of cognitive impairment are being investigated. However, evidence from dietary interventions is mainly from food and nutrient supplement interventions, with inconsistent results and high heterogeneity between trials. We conducted a comprehensive systematic search of randomized controlled trials (RCTs) published in MEDLINE-PubMed, from January 2018 to July 2021, investigating the impact of dietary counseling, as well as food-based and dietary supplement interventions on cognitive function in adults with or without cognitive impairment. Based on the search strategy, 197 eligible publications were used for data abstraction. Finally, 61 articles were included in the analysis. There was reasonable evidence that dietary patterns, as well as food and dietary supplements improved cognitive domains or measures of brain integrity. The Mediterranean diet showed promising results, whereas the role of the DASH diet was not clear. Healthy food consumption improved cognitive function, although the quality of these studies was relatively low. The role of dietary supplements was mixed, with strong evidence of the benefits of polyphenols and combinations of nutrients, but with low evidence for PUFAs, vitamin D, specific protein, amino acids, and other types of supplements. Further well-designed RCTs are needed to guide the development of dietary approaches for the prevention of cognitive impairment.

Cerebral Microbleeds and Cognitive Function in Ischemic Stroke or Transient Ischemic Attack Patients

2015 ◽  
Vol 40 (3-4) ◽  
pp. 130-136 ◽  
Author(s):  
Zhaolu Wang ◽  
Adrian Wong ◽  
Wenyan Liu ◽  
Jie Yang ◽  
Winnie C.W. Chu ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Cognitive Impairment ◽  
Cognitive Function ◽  
Transient Ischemic Attack ◽  
Cerebral Microbleeds ◽  
Cognitive Domains ◽  
Deep Region ◽  
Ischemic Attack ◽  
The Impact

Background: We explored the association between cerebral microbleeds (CMBs) and cognitive impairment in patients with ischemic stroke/transient ischemic attack (TIA). Methods: A total of 488 ischemic stroke/TIA patients received magnetic resonance imaging. Montreal Cognitive Assessment (MoCA) was used to evaluate global cognitive function and cognitive domains. The association of CMB quantity with cognitive function and the impact of CMB locations (strictly lobar, strictly deep, and mixed regions) on cognitive impairment were examined in regression models with adjustments for confounders. Results: A total of 113 subjects (23.2%) had ≥1 CMB. Strictly lobar, strictly deep, and mixed CMBs were identified in 36, 40, and 37 patients, respectively. The presence of ≥5 CMBs or strictly deep CMBs was associated with the MoCA total score (p = 0.007 and 0.020, respectively). Of all MoCA domains tested, a lower score in the attention domain was related to the presence of ≥5 CMBs (p = 0.014) and strictly deep CMBs (p = 0.028). Conclusion: CMBs were associated with cognitive dysfunction in stroke/TIA patients, especially in the attention domain. This association was mainly driven by CMBs in the deep region, underlining the role of hypertensive microangiopathy in stroke-related cognitive impairment.

scholarly journals Cognitive stimulation program in mild cognitive impairment A randomized controlled trial

2020 ◽  
Vol 14 (2) ◽  
pp. 110-117
Author(s):  
Isabel Gomez-Soria ◽  
Patricia Peralta-Marrupe ◽  
Fernando Plo
Keyword(s):  
Cognitive Impairment ◽  
Mild Cognitive Impairment ◽  
Cognitive Function ◽  
Barthel Index ◽  
Intervention Group ◽  
Cognitive Stimulation ◽  
Randomized Controlled ◽  
Post Test ◽  
The Impact

Abstract. Non-pharmacological cognitive interventions in mild cognitive impairment have demonstrated promising results in preventing or delaying cognitive impairment and functional disability. Cognitive stimulation seems to improve and maintain cognitive and social activity. Objective: This study aimed to evaluate the impact of a cognitive stimulation program in mild cognitive impairment (MCI) at the cognitive level on activities of daily living (ADLs), and levels of anxiety and depression. Methods: A randomized controlled single-blind trial involving 122 non-institutionalized elderly with a MEC-35 score of 24-27 was conducted. The intervention group (n=54) received the intervention (10-week cognitive stimulation program) and was compared with a control group (n=68) that received no intervention. Follow-up assessments were conducted post-test and at 6 months post-test. The primary outcome was cognitive function determined by changes in scores on the Spanish version (MEC-35) of the Mini-Mental State Examination, while the secondary outcomes were measured by the Barthel Index, Lawton and Brody Scale, Goldberg Questionnaire (anxiety sub-scale) and the Yesavage Geriatric Depression Scale (15-item version). Results: The intervention group showed a significant improvement in cognitive function at both timepoints, post-test and 6-month follow-up. The Barthel Index was higher in the intervention group, but only on the post-test analysis. The intervention did not improve the performance of instrumental ADLs or depression or anxiety levels. Conclusion: The findings showed cognitive improvements in an elderly population with MCI in the short and medium-term and improved basic ADLs in the short term. Clinicaltrials.gov Identifier: NCT03831061.

scholarly journals Impact of SARS-CoV-2 Infection on Cognitive Function: A Systematic Review

2021 ◽  
Vol 11 ◽  
Author(s):  
Yazen Alnefeesi ◽  
Ashley Siegel ◽  
Leanna M. W. Lui ◽  
Kayla M. Teopiz ◽  
Roger C. M. Ho ◽  
...  
Keyword(s):  
Systematic Review ◽  
Cognitive Impairment ◽  
Cognitive Function ◽  
Inflammatory Markers ◽  
Total Sample ◽  
Memory And Attention ◽  
Neurocognitive Impairments ◽  
The Impact ◽  
Attention Impairment

The prevalence and etiology of COVID-19's impact on brain health and cognitive function is poorly characterized. With mounting reports of delirium, systemic inflammation, and evidence of neurotropism, a statement on cognitive impairment among COVID-19 cases is needed. A substantial literature has demonstrated that inflammation can severely disrupt brain function, suggesting an immune response, a cytokine storm, as a possible cause of neurocognitive impairments. In this light, the aim of the present study was to summarize the available knowledge of the impact of COVID-19 on cognition (i.e., herein, we broadly define cognition reflecting the reporting on this topic in the literature) during the acute and recovery phases of the disease, in hospitalized patients and outpatients with confirmed COVID-19 status. A systematic review of the literature identified six studies which document the prevalence of cognitive impairment, and one which quantifies deficits after recovery. Pooling the samples of the included studies (total sample n = 644) at three standards of quality produced conservative estimates of cognitive impairment ranging from 43.0 to 66.8% prevalence in hospitalized COVID-19 patients only, as no studies which report on outpatients met criteria for inclusion in the main synthesis. The most common impairment reported was delirium and frequent reports of elevated inflammatory markers suggest etiology. Other studies have demonstrated that the disease involves marked increases in IL-6, TNFα, and IL-1β; cytokines known to have a profound impact on working memory and attention. Impairment of these cognitive functions is a characteristic aspect of delirium, which suggests these cytokines as key mediators in the etiology of COVID-19 induced cognitive impairments. Researchers are encouraged to assay inflammatory markers to determine the potential role of inflammation in mediating the disturbance of cognitive function in individuals affected by COVID-19.

Dietary interventions in mild cognitive impairment and dementia

2019 ◽  
Vol 21 (1) ◽  
pp. 69-82 ◽  
Keyword(s):  
Cognitive Impairment ◽  
Mild Cognitive Impairment ◽  
Functional Outcomes ◽  
Clinical Utility ◽  
Randomized Clinical Trials ◽  
Dietary Intervention ◽  
Nutritional Supplements ◽  
Dietary Interventions ◽  
Dietary Counseling ◽  
Nutritional Elements

Dietary intervention is an enticing approach in the fight against cognitive impairment. Nutritional supplements and dietetic counseling are relatively easy and benign interventions, but research has not yet yielded irrefutable evidence as to their clinical utility. Heterogeneity in the results of available clinical studies, as well as methodological and practical issues, does not allow replication and generalization of findings. The paper at hand reviews only randomized clinical trials of single nutrients, multi-nutrient formulations and dietary counseling in mild cognitive impairment and dementia of the Alzheimer's type focusing on both cognitive and functional outcomes. Thus far, folate, vitamin E, Ω-3 fatty acids, and certain multi-nutrient formulations have shown some preliminary promising results; larger, well-designed trials are needed to confirm these findings before nutritional elements can be incorporated in recommended clinical guidelines.

The Oxford Handbook of Adult Cognitive Disorders

2019 ◽  
Keyword(s):  
Cognitive Impairment ◽  
Cognitive Function ◽  
Neurodevelopmental Disorders ◽  
Brain Aging ◽  
Cognitive Disorders ◽  
Diverse Range ◽  
Medical Specialties ◽  
Psychiatric Illnesses ◽  
Medical Disorders ◽  
The Impact

The prevalence of cognitive impairment caused by neurodegenerative diseases and other neurologic disorders associated with aging is expected to rise dramatically between now and year 2050, when the population of Americans aged 65 or older will nearly double. Cognitive impairment also commonly occurs in other neurologic conditions, as well as in non-neurologic medical disorders (and their treatments), idiopathic psychiatric illnesses, and adult neurodevelopmental disorders. Cognitive impairment can thus infiltrate all aspects of healthcare, making it necessary for clinicians and clinical researchers to have an integrated knowledge of the spectrum of adult cognitive disorders. The Oxford Handbook of Adult Cognitive Disorders is meant to serve as an up-to-date, scholarly, and comprehensive volume covering most diseases, conditions, and injuries resulting in impairments in cognitive function in adults. Topics covered include normal cognitive and brain aging, the impact of medical disorders (e.g., cardiovascular, liver, pulmonary) and psychiatric illnesses (e.g., depression and bipolar disorder) on cognitive function, adult neurodevelopmental disorders (e.g., Down Syndrome, Attention Deficit/Hyperactivity Disorder), as well as the various neurological conditions (e.g., Alzheimer’s disease, chronic traumatic encephalopathy, concussion). A section of the Handbook is also dedicated to unique perspectives and special considerations for the clinicians and clinical researchers, covering topics such as cognitive reserve, genetics, diversity, and neuroethics. The target audience of this Handbook includes: (1) clinicians, particularly psychologists, neuropsychologists, neurologists (including behavioral and cognitive neurologists), geriatricians, and psychiatrists (including neuropsychiatrists), who provide clinical care and management for adults with a diverse range of cognitive disorders; (2) clinical researchers who investigate cognitive outcomes and functioning in adult populations; and (3) graduate level students and post-doctoral trainees studying psychology, clinical neuroscience, and various medical specialties.

scholarly journals Impact of Diet on Plasma Lipids in Individuals with Heterozygous Familial Hypercholesterolemia: A Systematic Review of Randomized Controlled Nutritional Studies

Nutrients ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 235
Author(s):  
Gabrielle Roy ◽  
Anykim Boucher ◽  
Patrick Couture ◽  
Jean-Philippe Drouin-Chartier
Keyword(s):  
Familial Hypercholesterolemia ◽  
Dietary Supplement ◽  
Guar Gum ◽  
Risk Of Bias ◽  
Omega 3 ◽  
Dietary Counseling ◽  
Randomized Controlled ◽  
Heterozygous Familial Hypercholesterolemia ◽  
Counseling Interventions ◽  
The Impact

Background: Conclusive data on the effectiveness of dietary interventions in heterozygous familial hypercholesterolemia (HeFH) management are unavailable. Whether this is due to a true lack of effects or biases in intervention designs remains unsettled. We systematically assessed the impact on LDL-C of published dietary randomized controlled trials (RCTs) conducted among individuals with HeFH in relation to their design and risk of bias. Methods: We systematically searched PubMed, Web of Science, and Embase in November 2020 to identify RCTs that assessed the impact of: (1) food-based interventions; (2) dietary counseling interventions; or (3) dietary supplements on LDL-C in individuals with HeFH. We evaluated the risk of bias of each study using the Cochrane Risk of Bias 2 method. Results: A total of 19 RCTs comprising 837 individuals with HeFH were included. Of those, five were food-based interventions, three were dietary counseling interventions and 12 were dietary supplement-based interventions (omega-3, n = 3; phytosterols, n = 7; guar gum, n = 1; policosanol, n = 1). One study qualified both as a food-based intervention and as a dietary supplement intervention due to its factorial design. A significant reduction in LDL-C levels was reported in 10 RCTs, including eight dietary supplement interventions (phytosterols, n = 6, omega-3, n = 1; guar gum, n = 1), one food-based intervention and one dietary counseling intervention. A total of 13 studies were judged to have some methodological biases in a way that substantially lowers confidence in the results. Studies at low risk of biases were more likely to report significant reductions in LDL-C concentrations, compared with studies at risk of bias (chi-square statistic: 5.49; p = 0.02). Conclusion: This systemic review shows that the apparent lack of effectiveness of diet manipulation in modulating plasma levels of LDL-C among individuals with HeFH is likely due to biases in study designs, rather than a true lack of effects. The likelihood of reporting significant reductions in LDL-C was associated with the concurrent risk of bias.

scholarly journals Effect of dietary interventions in mild cognitive impairment: a systematic review

2018 ◽  
Vol 120 (12) ◽  
pp. 1388-1405 ◽  
Author(s):  
Andrea M. McGrattan ◽  
Claire T. McEvoy ◽  
Bernadette McGuinness ◽  
Michelle C. McKinley ◽  
Jayne V. Woodside
Keyword(s):  
Cognitive Impairment ◽  
Folic Acid ◽  
Mild Cognitive Impairment ◽  
Cognitive Function ◽  
Dietary Intervention ◽  
Controlled Trial ◽  
Cognitive Status ◽  
Dietary Factors ◽  
Cognitive Outcomes ◽  
Dietary Interventions

AbstractDiet has been investigated in relation to its ability to promote cognitive function. However, evidence is currently limited and has rarely been systematically reviewed, particularly in a mild cognitive impairment (MCI) population. This review examined the effect of diet on cognitive outcomes in MCI patients. A total of five databases were searched to find randomised controlled trial (RCT) studies, with diet as the main focus, in MCI participants. The primary outcome was incident dementia and/or Alzheimer's disease (AD) and secondary outcomes included cognitive function across different domains using validated neuropsychological tests. Sixteen studies met the inclusion criteria. There was a high degree of heterogeneity relating to the nature of the dietary intervention and cognitive outcomes measured, thus making study comparisons difficult. Supplementation with vitamin E (one study, n 516), ginkgo biloba (one study, n 482) or Fortasyn Connect (one study, n 311) had no significant effect on progression from MCI to dementia and/or AD. For cognitive function, the findings showed some improvements in performance, particularly in memory, with the most consistent results shown by B vitamins, including folic acid (one study, n 266), folic acid alone (one study, n 180), DHA and EPA (two studies, n 36 and n 86), DHA (one study, n 240) and flavonol supplementation (one study, n 90). The findings indicate that dietary factors may have a potential benefit for cognitive function in MCI patients. Further well-designed trials are needed, with standardised and robust measures of cognition to investigate the influence of diet on cognitive status.

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