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dc.contributor.advisorLesk, Valerie E.
dc.contributor.advisorWalters, Elizabeth R.
dc.contributor.authorRyan, Clarice A.
dc.date.accessioned2022-07-26T15:49:45Z
dc.date.available2022-07-26T15:49:45Z
dc.date.issued2020
dc.identifier.urihttp://hdl.handle.net/10454/19072
dc.description.abstractThe burden of neurocognitive diseases, such as Alzheimer’s, is of global concern and points to an urgent need for accurate detection and prevention strategies. This thesis investigated dietary components, in particular those that affect vitamin B levels, such as white fish consumption and veganism, which have the potential to alter cognitive outcomes in the population. Also investigated were external factors, significantly caffeine consumption, time of day, and quantity of sleep, not associated with age-related impairment, that can alter neuropsychological test performance. The literature reveals that short, multi-domain cognitive tests are commonly used for dementia screening; this study has focused exclusively on cognitive domains associated with the early stages of Alzheimer’s disease. Cognitively healthy adults were assessed using a cognitive test battery that focused on memory and processing speed. Memory test scores improved by 0.03 points for every gram of white fish consumed, whilst participants following a vegan diet scored significantly worse on tests of composite memory than their omnivorous counterparts. Interaction tests showed that prior caffeine consumption improved short-term memory test scores up to age 70. Participants of all ages performed best at their age-optimal times and further improved for immediate word recall tests with prior caffeine consumption. Processing speed scores increased linearly with hours of sleep. The results of this thesis suggest that nutrition and external factors have a significant impact on cognitive test performance. These novel findings have implications for research, diagnosis and prevention of chronic neurological disease, and public health guidance relating to cognitive function, for all ages.en_US
dc.language.isoenen_US
dc.rights<a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-nc-nd/3.0/88x31.png" /></a><br />The University of Bradford theses are licenced under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/">Creative Commons Licence</a>.eng
dc.subjectDieten_US
dc.subjectMemoryen_US
dc.subjectCognitionen_US
dc.subjectAgeingen_US
dc.subjectWhite fishen_US
dc.subjectVeganismen_US
dc.subjectCaffeineen_US
dc.titleInvestigations into the Impact of Modifiable Dietary Components on Cognition. Fish, the Vegan Diet and Lifestyle Factorsen_US
dc.type.qualificationleveldoctoralen_US
dc.publisher.institutionUniversity of Bradfordeng
dc.publisher.departmentFaculty of Management, Law and Social Sciencesen_US
dc.typeThesiseng
dc.type.qualificationnamePhDen_US
dc.date.awarded2020
refterms.dateFOA2022-07-26T15:49:45Z


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