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Gerstmann's syndrome
Gerst·mann's syndrome 'gerst-mənz- n cerebral dysfunction characterized esp. by finger agnosia, disorientation with respect to right and left, agraphia, and acalculia and caused by a lesion in the dominant cerebral hemisphere involving the angular gyrus and adjoining occipital gyri
Gerst·mann 'gerst-män; 'gərst-mən Josef (1887-1969)
Austrian neurologist and psychiatrist. Gerstmann was in charge of a hospital for nervous and mental diseases during World War I, and after the war he occupied a similar position in Vienna where he also served as a university lecturer in neurology and psychiatry. He was the author of more than a hundred papers on neuropsychiatry, including a 1924 article that gave the first description of the brain disorder now called Gerstmann's syndrome.

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a group of symptoms that represent a partial disintegration of the patient's recognition of his body image. It consists of an inability to name the individual fingers, misidentification of the right and left sides of the body, and inability to write or make mathematical calculations (see acalculia, agraphia). It is caused by disease in the association area of the left parietal lobe of the brain.
J. G. Gerstmann (1887-1969), Austrian neurologist

Medical dictionary. 2011.