Motor aphasia

Japanese: 運動性失語 - うんどうせいしつご
Motor aphasia

...because most of us are right-handed.
[Broca's aphasia (motor aphasia)]
The amount of speech is small, and speech is halting and congested, resulting in what is known as non-fluent speech. Even if the amount of speech increases, the patient shows symptoms of agrammatism, dropping particles such as te, ni, o, and ha and speaking in a telegram-like manner.

From [Cerebral infarction]

...Depending on the affected area, symptoms such as aphasia, apraxia (when there is no impairment of motor function in the limbs, face, tongue, etc., and the person is unable to perform the intended action despite knowing what to do), and agnosia (when there is no impairment of perception or sensation, but the person is unable to recognize objects) may appear. Aphasia is caused by damage to the patient's dominant cerebral hemisphere (the left side in right-handed people) and is divided into sensory aphasia (when language comprehension is primarily impaired) and motor aphasia (when language comprehension is preserved but the ability to express one's own language is primarily impaired). Damage to the parietal lobe of the dominant hemisphere can also cause Gerstmann's syndrome (fingers agnosia, left-right agnosia, dyscalculia, and writing disorders). ...

*Some of the terminology explanations that refer to "motor aphasia" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…われわれの大部分の人間が右利きだからである。
[ブローカ失語(運動性失語)]
 発語量が少なく,つっかえながら渋滞した話し方で,いわゆる非流暢(りゆうちよう)な話し方になる。発語の量がふえても,〈て,に,を,は〉などの助詞をおとして電報文のような言葉を話す症状(失文法)を示す。…

【脳梗塞】より

…そのほか障害される部位によっては,失語や失行(四肢,顔,舌などに運動機能の障害がなく,なすべき動作はわかっているのに目的にかなった動作ができないもの),失認(知覚,感覚の障害はないが対象を認知できないもの)などの症状を呈する。失語は患者の優位大脳半球(右利きの人の場合は左側)の障害によって生じ,感覚性失語(言語理解が主として障害されるもの),運動性失語(言語理解は保たれているが自分の言語を表出する機能が主として障害されるもの)などに分けられる。また優位半球の頭頂葉の障害によりゲルストマン症候群Gerstmann’s syndrome(手指失認,左右失認,計算障害,書字障害)が生ずる。…

※「運動性失語」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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