The effects of dietary intake on memory and sleep quality
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- Tez No: 780188
- Danışmanlar: Belirtilmemiş.
- Tez Türü: Yüksek Lisans
- Konular: Nöroloji, Psikoloji, Neurology, Psychology
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2019
- Dil: İngilizce
- Üniversite: University of London - Birkbeck
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 65
Özet
Nutrition has an effect on a wide range of physiological and cognitive mechanisms. Plantbased diets are known to be associated with a healthy cardiovascular and cerebrovascular system. Studies on the Mediterranean diet have shown that diets high in fruits and vegetables are linked with better cognitive performance and lower rates of neurodegenerative disorders such as Alzheimer's Disease and Parkinson's Disease. Most studies have focused on vegetarian or pescatarian diets while vegan diets, which exclude all animal products, have not been systematically investigated. This study assessed verbal memory and sleep quality in a cohort of sixty-two adults aged 40 and above who were split into strictly-defined dietary categories: vegan, vegetarian, pescatarian, omnivores with low meat/fish consumption and omnivores with high meat/fish consumption. Verbal memory was assessed using the California Verbal Learning Test (CVLT) and sleep quality was evaluated using the Pittsburgh Sleep Quality Index (PSQI). Participants were allocated to dietary groups based on a modified scoring system using the Mediterranean Diet Adherence Screener (MEDAS) questionnaire. Three aspects of memory were measured by the CVLT -1 immediate recall, delayed recall and recognition. Only delayed recall showed a significant effect for diet; there were no significant effects for memory once covariates (gender, education level and sleep quality) were included. Gender was found to be a highly significant predictor of immediate and delayed recall. This may have been due to significant differences in dietary groups of males and females. The sample size, once diluted by the five diet categories, may have been insufficient to capture differences between some of the groups. Further research is needed to elucidate the protective role of plant-based diets on cognitive functions and sleep quality.
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