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Is the Left Brain Always Right?

In 1780, Professor Meinard Simon Du Pui suggested that from a medical point of view, man was Homo Duplex – that is, he possesses a ‘double brain’.  Nearly a century later, in the late 1800s, London physician Arthur Ladbroke Wigan was viewing the autopsy of one of his patients and when the skull was cut open he found one of the patient’s cerebral hemispheres was missing. Wigan was surprised because he knew the man could read, write and function normally. Wigan therefore concluded that if one cerebral hemisphere was capable of supporting a fully functioning mind and personality, it followed that normal humans with two intact hemispheres must have two minds.