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A 53-year-old, right-handed woman presented with a 3-year history of difficulty in expressing herself properly and understanding spoken language. Her family reported that she had felt disoriented in familiar places and was unable to recall recent events or remember names of family members. They noticed behavioral changes consisting of irritability and aggressiveness. The patient became increasingly depressed and anxious and developed a left-sided clumsiness and a mild symmetric tremor mainly affecting the hands.
Eight months before admission, the patient had myoclonic jerks in the left arm. During the 3 months before admission, she developed trouble with reading and writing. Shortly thereafter, she was unable to perform activities of daily l…