Preserved capacity to copy drawings in severe aphasics with little premorbid experience

Abstract

Preserved performances in copying drawings and sketching exhibited by three individuals with severe aphasia and little premorbid experience are described. The patients were aged 84, 66 and 53 years, and were all right-handed. Each had extensive damage to the left hemisphere but little damage to the post-rolandic regions of the right hemisphere. In contrast to the preserved abilities in copying drawings and a two-dimensional cube, all performed poorly in Kohs Block Designs. Two had difficulty in copying their own names. The following conclusions were drawn: (1) among severe aphasics, some patients show superior capability in copying drawings and sketching; (2) it is surmised that the right hemisphere contributes heavily to the manifestation of these capabilities; (3) severe damage to the left hemisphere presumably weakens its interaction with the right hemisphere, whose functions could subsequently be easily and effectively released; (4) the ability of copying drawings may enhanca the quality of life and thus provide a useful means of rehabilitation in aphasics.