Gerstmann Syndrome Overview Gerstmann's syndrome is a cognitive impairment that results from damage to a specific area of the brain known as the left parietal lobe in the region of the angular gyrus. It may occur after a stroke or in association with damage to the parietal lobe. It is characterized by four primary symptoms: A writing disability (agraphia or dysgraphia) A lack of understanding of the rules for calculation or arithmetic (acalculia or dyscalculia) An inability to distinguish right from left An inability to identify fingers (finger agnosia) Many adults also experience aphasia, (difficulty in expressing oneself when speaking, in understanding speech, or in reading and writing). The disorder should not be confused with Gerstmann-Sträussler-Scheinker disease, a type of transmissible spongiform encephalopathy. There are few reports of the syndrome, sometimes called developmental Gerstmann's syndrome, in children. The cause is not known. Most cases are identified when...