This refers to a condition in which a person is unable to write despite having no motor disorders of the hands or arms, and no intellectual or mental disorders. It is caused by an acquired localized lesion in the cerebrum. It often accompanies aphasia (→ aphasia), apraxia, or agnosia. There are various types, ranging from cases in which automatic writing, dictation, and copying are all impossible, cases in which automatic writing is impossible but dictation and copying are possible, and cases in which automatic writing is possible but copying is impossible. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
手や腕の運動障害がなく,知能や精神の障害もないのに文字が書けなくなる症状をいう。大脳の後天的な局所的病変によって起きる。失語 (→失語症 ) や失行,失認に付随して現れることが多い。自動書記,書取り,写字すべてが不能な場合から,自動書記は不能であるが書取りと写字はできる場合,自動書記は可能であるが写字は不能な場合など,種々のタイプがある。
出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報 |
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