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Gerstmann’s syndrome

a set of four symptoms associated with lesions of a specific area of the (usually left) parietal lobe. They are inability to recognize one’s individual fingers (finger agnosia; see tactile agnosia), inability to distinguish between the right and left sides of one’s body (right–left disorientation), inability to perform mathematical calculations (acalculia), and inability to write (agraphia). The existence of Gerstmann’s syndrome as a true independent entity is subject to debate. [Josef G. Gerstmann (1887–1969), Austrian neurologist]

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Psychology term of the day

May 26th 2024

metachromatic leukodystrophy

metachromatic leukodystrophy

an autosomal recessive disorder (see recessive allele) characterized by deficiency or absence of the enzyme arylsulfatase A, which results in loss of myelin in the nervous system and accumulation of cerebroside sulfate (a type of myelin lipid) within the white matter of the central nervous system. Loss of motor function and deterioration in mental ability most commonly develop after the 1st year of life (late infantile form), but symptoms may also appear between 3 and 10 years of age (juvenile form) or around age 30 (adult form).