高齢者における軽度の認知障害
Alistair Burns1, Michael Zaudig
1University of Manchester, School of Psychiatry and Behavioural Sciences, Wythenshawe Hospital, Manchester, UK. a_burns@man.ac.uk
Lancet (London, England)
|December 21, 2002
まとめ
軽度の認知障害 (MCI) は,アルツハイマー病のリスクの重要な指標です. MCIを早期に特定することは,認知症を予防し,社会的影響を軽減する機会を提供します.
科学分野:
- 神経学 神経学とは
- ゲリアトリック・メディシン (老年医学)
- コグニティブ・サイエンス コグニティブ・サイエンス
背景:
- アルツハイマー病 (AD) に関する公衆の意識が高まると,記憶に関する懸念が増える.
- 記憶の苦情は様々な状態から生じ,早期認知症の症状である.
- 軽度の認知障害 (MCI) は,認知症の診断に十分なほど深刻ではない記憶喪失を記述しますが,ADのリスクが高いことを示します.
研究 の 目的:
- 磁気共振ヒポカンパの体積測定とスペクトロスコピーの診断の精度を評価する.
- MCIの患者,正常な対照群,アルツハイマー病患者の区別を図る.
- 認知症予防戦略のターゲットとしてMCIの可能性を調査する.
主な方法:
- マグネティック共振 (MR) ヒッポカンプス体積計.
- MR光学 (N-アセチルアスパルテート/クレアチンの比率).
- MCI,正常,およびADグループにおける比較分析.
主要な成果:
- ヒポキャンパスの体積とN-アセチルアスパルテート/クレアチンのスペクトロスコピーは,MCIとADの区別に敏感でした.
- 組み合わせたMR評価は,MCI/ADと通常の対照群の差別を改善しました.
- ADの組織病理学的特徴は,臨床的認知症のない個人の有意な部分に存在します.
結論:
- MCIは,アルツハイマー病のリスクが高く,認知症の前期的な状態を表しています.
- MCIの早期発見は,認知症予防戦略の開発と実施において極めて重要です.
- MCIの基準のさらなる検証と介入研究は,認知症の個人および社会的負担を軽減するための優先事項です.
関連する概念動画
01:30Cognitive Enhancers: Cholinesterase Inhibitors and NMDA Receptor Antagonists
Cognitive enhancers, also known as "smart drugs," are substances used to enhance memory, mental alertness, and concentration. These can be natural or synthetic and improve cognition in conditions like Alzheimer's disease (AD) and other neurodegenerative diseases. Some common examples include caffeine, amphetamines, methylphenidate, modafinil, arecoline, donepezil, vortioxetine, and piracetam. These enhancers work on the principle of synaptic plasticity and altered circuit function. They...
01:26Alzheimer's Disease: Overview
Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ and tau...
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ and tau...
01:30Dementia
Dementia is a collective term for cognitive disorders primarily affecting memory, thinking, and reasoning. It is not a specific disease but a syndrome, with Alzheimer's disease being the most common cause, accounting for approximately 60-80% of cases. Other types include vascular dementia, Lewy body dementia, and frontotemporal dementia. Dementia affects millions worldwide, particularly older adults, though it is not a normal part of aging.
The progression of dementia is generally gradual.
The progression of dementia is generally gradual.
01:30Cognitive Development During Adulthood
Cognitive development continues throughout adulthood, undergoing significant shifts across early, middle, and late stages. Individual transition occurs from adolescent idealism to pragmatic and adaptable thinking in early adulthood. During this period, individuals learn to integrate personal beliefs with the recognition that other perspectives are equally valid. Exposure to the complexities of modern society, diverse experiences, and higher education contribute to this adaptive thought process,...
01:29Alzheimer Disease l: Introduction
Alzheimer disease is a chronic, progressive, and irreversible neurodegenerative disorder and the most common cause of dementia in older adults. It leads to gradual neuronal loss, causing cognitive decline, behavioral changes, and loss of functional independence.Risk Factors and EtiologyThe disease is multifactorial. Age is the strongest risk factor, with prevalence doubling every 5 years after age 65. Genetic factors include mutations in genes such as APP, PSEN1, and PSEN2, which are associated...
01:22Dementia l: Introduction
Dementia is an acquired, progressive syndrome characterized by a decline in multiple cognitive domains severe enough to impair daily functioning and reduce independence. Although memory loss is a central feature, the diagnosis requires additional deficits involving language, executive function, visuospatial skills, judgment, calculation, or abstract reasoning. These cognitive impairments reflect underlying neurodegenerative or vascular processes that gradually disrupt neuronal networks...