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Broca‘s Area and Wernicke's Area

Broca‘s Area and Wernicke's Area. B9902022 周書民 B9902037 胡紀豪. Broca's area. Pierre Paul Broca reported impairments in two patients who had lost the ability to speak after injury of the brain. Since then, the approximate region he identified has become known as Broca’s area.

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Broca‘s Area and Wernicke's Area

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  1. Broca‘s Areaand Wernicke's Area B9902022 周書民 B9902037 胡紀豪

  2. Broca's area • Pierre Paul Broca reported impairments in two patients who had lost the ability to speak after injury of the brain. Since then, the approximate region he identified has become known as Broca’s area

  3. Wernicke ‘s area • Karl Wernicke, a German neurologist and psychiatrist who discovered that damage to this area could cause a type of aphasia (now called Wernicke's aphasia or receptive aphasia) in 1870’s.

  4. Location • Both in dominantcerebral hemisphere (97% in left hemisphere) • Broca‘s area :posterior to inferior frontal gyrus • Wernicke ‘s area : The posterior section of the superior temporal gyrus (STG)

  5. Location

  6. 唸看到的字詞 唸聽到的字詞

  7. Wernicke ‘s aphasia • impairment of language comprehension, and speech that has a natural-sounding rhythm but a jumbled syntax without recognisable meaning (sounds fluent but makes no sense)

  8. Broca‘s aphasia • Patients with Broca‘s aphasiaunderstand what is being said to them, but are unable to speak fluently. • Other symptoms include problems with articulation, word-finding, word repetition, and producing and comprehending complex grammatical sentences, both orally and in writing.

  9. 比較 •  布洛卡區損傷(布洛卡失語症) • 使一個人無法講話 • 可以了解語言內容 • 無法用字詞 • 說話緩慢並且不連貫 • 韋尼克氏區損傷(韋尼克氏失語症) • 無法了解語言內容 • 可以清楚的說話但是字詞的使用是無意義的組合這種現象被稱為「字詞沙拉」，因為他們把字彙就像生菜沙拉混合在一起使用

  10. 研究方法的演進與歷史 • 50年代初期Wilder Penfield 和 Herbert Jasper 用電刺激腦部 → 抑制語言

  11. 60年代 Wada測試，使用sodium amytal (amobarbital) 麻醉劑注入左右頸動脈 → 測試語言能力

  12. 近期使用腦部顯影技術(正子掃描) → • 右腦損傷會有情緒上的問題，稱為aprosodia

  13. 補充Right homologous areaof Wernicke's area • Research suggests that the area corresponding to the Wernicke’s area in the non-dominant cerebral hemisphere has a role in processing and resolution of subordinate meanings of ambiguouswords. In contrast, the Wernicke's area in the dominant hemisphere processes dominant word meanings.

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