Reading, writing and drawing disorder due to right brain damage.

The author studies the written language in a series of right-handed patients with a right side cerebral lesion. Reduplications and omission of strokes and of letters are noted on writing. The cause of these disorders is attributed by the author to an impairment of visual and kinesthetic control of the act of writing, and not to a truly aphasic alteration. This impairment is part of a more general deficit, namely a distorted interpretation of spatial data. The author proposes to call this writing disorder afferent dysgraphia.