Sensory aphasia

Japanese: 感覚性失語 - かんかくせいしつご
Sensory aphasia

...occurs due to damage to the left frontal lobe.
[Wernicke's aphasia (receptive aphasia)]
Speech is fluent and there is no agrammatism, but there are many grapheme paraphasias and word paraphasias. Speech that is fluent but has many grapheme paraphasias, word paraphasias, and neologisms and is difficult to understand is called jargon.

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 "sensory aphasia" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…左前頭葉の損傷で起こる。
[ウェルニッケ失語(感覚性失語)]
 話し言葉の表出は流暢で,失文法もないが,字性錯語や語性錯語が多い。このように流暢ではあるが字性錯語や語性錯語,新造語が多くて理解できない話し方をジャーゴンjargonと呼ぶ。…

【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。…

※「感覚性失語」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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