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Over activity in the speech area known as Wernicke’s area can trigger auditory hallucinations (e.g., the illusion that internally generated thoughts are actually real voices coming from outside the brain). Disturbances in the occipital lobes (e.g., visual system) can contribute to difficulty in interpreting complex images, recognizing motion, and interpreting emotions on the faces of other individuals. (The Brain in Schizophrenia.)