The syndrome consists in a primary loss of ability to recognize, identify, name, select, indicate and orient as to the individual fingers of either hand the patient''s own and those of others (fingeragnosia). There is a characteristic lack of recognition and orientation for the right and left sides in one''s own body and in that of others (somato-lateral agnosia). These disorders are commonly combined with an isolated dys- or agraphia and an isolated dys- or acalculia of definite character, varying significantly from the aphasic, apractic, and spatial-agnostic types. Psychic or intellectual disorders, or motor or sensory changes are absent. It is of clinical-diagnostic value in establishing a local pathologic process affecting the lower part of the dominant parieto-occipital region of the brain, in that nodal area which corresponds to the angular gyrus in its transition to the second occipital convolution.