Show simple item record

dc.contributor.authorFaraco, Carlos Cesar
dc.date.accessioned2014-03-04T20:38:40Z
dc.date.available2014-03-04T20:38:40Z
dc.date.issued2012-12
dc.identifier.otherfaraco_carlos_c_201212_phd
dc.identifier.urihttp://purl.galileo.usg.edu/uga_etd/faraco_carlos_c_201212_phd
dc.identifier.urihttp://hdl.handle.net/10724/28516
dc.description.abstractMild cognitive impairment (MCI) is often viewed as an intermediate phase between normal aging and Alzheimer’s disease (AD). Consequently, it is important to identify biomarkers of this pre-clinical phase of AD in order to provide preventative treatments. In the present study, MCI participants underwent functional magnetic resonance imaging (fMRI) and diffusion tensor imaging (DTI) scanning. FMRI data was acquired while participants performed a complex working memory span (CWKMS) task and DTI diffusivity indices were correlated with performance on cognitive measures. FMRI findings suggest that superior temporal gyrus hyper-activation during CWKMS performance may be a previously undiscovered biomarker of memory impairment in MCI. Performance on a delayed memory measure demonstrated widespread negative correlations with DTI diffusivity measures in those with MCI along several pathways connecting cortical regions involved in memory performance, suggesting that impaired memory performance in MCI and AD may be compounded by global white matter deterioration. Altogether, functional and structural imaging biomarkers of MCI were identified which may further aid in elucidating the causes of memory impairment in MCI and providing targeted treatments.
dc.languageeng
dc.publisheruga
dc.rightspublic
dc.subjectMild cognitive impairment
dc.subjectdementia
dc.subjectworking memory
dc.subjectwhite matter
dc.subjectfunctional magnetic resonance imaging (fMRI)
dc.subjectdiffusion tensor imaging (DTI)
dc.titleFunctional and diffusion MRI biomarkers of mild cognitive impairment
dc.typeDissertation
dc.description.degreePhD
dc.description.departmentBiomedical and Health Sciences Institute
dc.description.majorNeuroscience
dc.description.advisorStephen Miller
dc.description.committeeStephen Miller
dc.description.committeeQun Zhao
dc.description.committeeNathan Yanasak
dc.description.committeeJennifer McDowell
dc.description.committeeTianming Liu


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record