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Articles 1 - 4 of 4
Full-Text Articles in Medicine and Health Sciences
Validation Of Arterial Spin Labeling For Longitudinal Monitoring And Differential Diagnosis Of Frontotemporal Dementia, Tracy Ssali
Electronic Thesis and Dissertation Repository
Frontotemporal dementia (FTD) is a devastating neurodegenerative disease characterized by a rapid decline in behavioural, language, and motor abilities. Advances in the understanding of FTD genetics and pathophysiology, and the subsequent development of novel disease modifying treatments have highlighted the need for tools to assess their efficacy. While structural magnetic resonance imaging (MRI) and functional imaging with 18F-flurodeoxyglucose (FDG) positron emission tomography (PET) are used for clinical diagnosis, structural changes are subtle at the early stages and PET imaging is expensive and access limited. Given the coupling of cerebral blood flow (CBF) to energy metabolism, an attractive alternative is …
Describing Functional Brain Connectivity's Role In The Relationship Of Multimodal Interventions To Improve Cognitive And Physical Function In Vulnerable (Frailty & Mild Cognitive Impairment) Older Adults., Nicholas (Nick) W. Bray
Describing Functional Brain Connectivity's Role In The Relationship Of Multimodal Interventions To Improve Cognitive And Physical Function In Vulnerable (Frailty & Mild Cognitive Impairment) Older Adults., Nicholas (Nick) W. Bray
Electronic Thesis and Dissertation Repository
Aging is associated with declining cognitive and physical function. The decline accelerates in older adults diagnosed with mild cognitive impairment (MCI), a pre-dementia state, and frailty, a state of decreased physiological reserve. Previous work shows that frailty modifies the relationship between dementia pathology and clinical symptoms. Functional brain network connectivity (FBNC) refers to brain areas that are anatomically separate but temporally related in their neural signaling; it is believed to enable the completion of complex cognitive and physical functions. FBNC is considered a sensitive biomarker for monitoring the progression of dementia syndromes and investigating the efficacy of interventional strategies. Therefore, …
Protein Misfolding Toxicity And Inclusion Formation In Cellular Models Of Neurodegeneration, Sonja E. Di Gregorio
Protein Misfolding Toxicity And Inclusion Formation In Cellular Models Of Neurodegeneration, Sonja E. Di Gregorio
Electronic Thesis and Dissertation Repository
Protein misfolding characterizes most neurodegenerative diseases. Protein misfolding is the conversion of specific proteins from their normal, often soluble, and native three-dimensional conformation into an aberrant, often insoluble, non-functional conformation. Protein inclusions and aggregates are among the major pathological hallmarks of protein misfolding associated with many neurodegenerative diseases. Yet, the role of aggregates and inclusions is not clearly defined and heavily debated. This study utilizes powerful genetic approaches in yeast and verification in mammalian neuronal cell lines to address the misfolding and toxicity of three proteins, the Rho Guanine Nucleotide Exchange Factor (RGNEF), Matrin3, which are involved in amyotrophic lateral …
Evaluating Anesthetic Protocols For Non-Human Primate Functional Neuroimaging, Megha Verma
Evaluating Anesthetic Protocols For Non-Human Primate Functional Neuroimaging, Megha Verma
Electronic Thesis and Dissertation Repository
Functional magnetic resonance imaging (fMRI) is a non-invasive technique that can be used to measure a proxy of neural activity in vivo with high spatial specificity. One subject can be followed for a long period of time to assess changes in functional brain organization. However, fMRI is extremely sensitive to motion. The challenges of training non-human primates to reduce motion in an MRI scanner motivate the study of anesthesia which is commonly used to substitute for this training. In this thesis, I compare three different commonly used anesthetic protocols: isoflurane, propofol-fentanyl in combination, and fentanyl alone, to test which of …