Selective lower-case letter ideational dysgraphia.

A case study of a man with a selective ideational dysgraphia for lower-case letters is described. His spelling skills were only very mildly impaired and there was no evidence of other praxic or visuoconstructional impairments. The findings are discussed in the context of information processing models. It is suggested that the representation of upper- and lower-case letters must be fairly independent.