Distinct Spontaneous Brain Activity Patterns in Different Biologically-Defined Alzheimer’s Disease Cognitive Stage: A Preliminary Study
Autor: | Peiyu Huang, Xiao Luo, Yeerfan Jiaerken, Jingjing Xu, Shuyue Wang, Minming Zhang, Qingze Zeng, Chao Wang, Jiong Zhou, Kaicheng Li, Xiaojun Xu, Ruiting Zhang, Hui Hong |
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Jazyk: | angličtina |
Rok vydání: | 2019 |
Předmět: |
0301 basic medicine
Aging fractional amplitude of low-frequency fluctuation Brain activity and meditation Cognitive Neuroscience Precuneus Hippocampus cerebrospinal fluid lcsh:RC321-571 03 medical and health sciences 0302 clinical medicine Inferior temporal gyrus medicine Dementia lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry Original Research A/T/N system spontaneous neuronal activity medicine.diagnostic_test Postcentral gyrus business.industry medicine.disease functional magnetic resonance imaging 3. Good health 030104 developmental biology medicine.anatomical_structure Posterior cingulate Functional magnetic resonance imaging business Alzheimer’s disease Neuroscience 030217 neurology & neurosurgery |
Zdroj: | Frontiers in Aging Neuroscience, Vol 11 (2019) Frontiers in Aging Neuroscience |
ISSN: | 1663-4365 |
DOI: | 10.3389/fnagi.2019.00350 |
Popis: | Background: The National Institute on Aging-Alzheimer’s Association (NIA-AA) has proposed a biological definition of Alzheimer’s disease (AD): individuals with both abnormal amyloid and tau biomarkers (A+T+) would be defined as AD. It remains unclear why different cognitive status is present in subjects with biological AD. Resting-state functional magnetic resonance imaging (rsfMRI) has provided an opportunity to reveal the brain activity patterns in a biologically-defined AD cohort. Accordingly, we aimed to investigate distinct brain activity patterns in subjects with existed AD pathology but in the different cognitive stages. Method: We selected individuals with AD pathology (A+T+) and healthy controls (HC, A−T−) based on the cerebrospinal fluid (CSF) biomarkers. According to the cognitive stage, we divided the A+T+ cohort into three groups: (1) preclinical AD; (2) prodromal AD; and (3) AD with dementia (d-AD). We compared spontaneous brain activity measured by a fractional amplitude of low-frequency fluctuation (fALFF) approach among four groups. Results: The analysis of covariance (ANCOVA) results showed significant differences in fALFF in the posterior cingulate cortex/precuneus (PCC/PCu). Further, compared to HC, we found increased fALFF values in the right inferior frontal gyrus (IFG) in the preclinical AD stage, whereas prodromal AD patients showed reduced fALFF in the bilateral precuneus, right middle frontal gyrus (MFG), right precentral gyrus, and postcentral gyrus. Within the d-AD group, both hyperactivity (right fusiform gyrus, right parahippocampal gyrus (PHG)/hippocampus, and inferior temporal gyrus) and hypoactivity (bilateral precuneus, left posterior cingulate cortex, left cuneus and superior occipital gyrus) were detected. Conclusion: We found the distinct brain activity patterns in different cognitive stages among the subjects defined as AD biologically. Our findings may be helpful in understanding mechanisms leading to cognitive changes in the AD pathophysiological process. |
Databáze: | OpenAIRE |
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