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• W1992816826 abstract "<b><i>Background:</i></b> The reduction of <i>N</i>-acetylaspartate (NAA) detected by proton MR spectroscopy (¹H-MRS) represents a robust but unspecific marker for neuronal loss or dysfunction. <b><i>Objective:</i></b> To apply ¹H-MRS in two brain regions that reflect the characteristic spatial distribution of neuronal loss in AD. These regions are the medial temporal lobe (MTL), which is affected early in AD, and the primary motor and sensory cortex (central region), which is affected late in the disease and might serve as an intraindividual control region in mild to moderate disease stages. <b><i>Methods:</i></b> Twenty patients and 18 volunteers underwent ¹H-MRS in both brain areas. The metabolic ratios of NAA/creatine and choline/creatine were determined. Additionally, the metabolic ratios of the MTL were divided by the ratios of the central region to assess the relative change in the MTL in individual subjects. All ratios were correlated with psychometric test scores. <b><i>Results:</i></b> A significant reduction of NAA/creatine and choline/creatine ratios was detected in the MTL of patients with AD. In the central region, no significant difference between the groups was found. NAA/creatine (MTL/central region) was reduced in patients with AD and showed a correlation with the Mini-Mental State Examination and the cognitive part of the Alzheimer Disease Assessment Scale scores. Choline/creatine (MTL/central region) did not show a significant difference between groups. <b><i>Conclusion:</i></b> Assessing the distribution of NAA/creatine reduction guided by the expected neuropathologic change can improve the role of ¹H-MRS in the assessment of AD. The disease severity can be monitored by relative reduction of NAA/creatine in the MTL in comparison with an intraindividual unaffected control region." @default.
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• W1992816826 date "2000-09-12" @default.
• W1992816826 modified "2023-10-01" @default.
• W1992816826 title "Proton MR spectroscopy detects a relative decrease of N-acetylaspartate in the medial temporal lobe of patients with AD" @default.
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• W1992816826 doi "https://doi.org/10.1212/wnl.55.5.684" @default.
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