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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Cerebral atrophy ： ウィキペディア英語版 Cerebral atrophy Cerebral atrophy is a common feature of many of the diseases that affect the brain.〔(Cerebral Atrophy Information Page: National Institute of Neurological Disorders and Stroke (NINDS) )〕 Atrophy of any tissue means a decrement in the size of the cell, which can be due to progressive loss of cytoplasmic proteins. In brain tissue, atrophy describes a loss of neurons and the connections between them. Atrophy can be generalized, which means that all of the brain has shrunk; or it can be focal, affecting only a limited area of the brain and resulting in a decrease of the functions that area of the brain controls. If the cerebral hemispheres (the two lobes of the brain that form the cerebrum) are affected, conscious thought and voluntary processes may be impaired. Some degree of cerebral shrinkage occurs naturally with age; after the brain completes growth and attains its maximum mass at around age 25, it gradually loses mass with each decade of life, although the rate of loss is comparatively tiny until the age of 60, when approximately .5 to 1% of brain volume is lost per year. By age 75, the brain is an average of 15% smaller than it was at 25. Some areas of the brain such as short-term memory are affected more than others and men lose more brain mass overall than women. Cerebral atrophy greatly increases in elderly persons (meaning over the age of 75) and especially causes a diminution of functions such as judgement and social appropriateness (which results in the typical characteristic of elderly people engaging in inappropriate or offensive behaviors in front of others). Brain atrophy does not affect all regions with the same intensity as shown by neuroimaging.〔(Brainmarkers.com )〕 ==Possible Causes and Associated Diseases and Disorders== The pattern and rate of progression of cerebral atrophy depends on the disease involved. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cerebral atrophy」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.