Wada test

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A procedure for determining which cerebral hemisphere is dominant for speech production by injecting an anaesthetic (sodium amytal) into one of the carotid arteries that supply blood to the brain and noting whether speech is immediately disrupted, indicating that the anaesthetized hemisphere is dominant for speech. [Named after the Japanese-born Canadian physician Juhn Atsushi Wada (born 1924) who introduced it in 1949]

Subjects: Psychology.

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