Keyboard typing is a multifunctional task related to language, visual-spatial and motor abilities. If one of these functions is impaired, difficulty during typing could occur. Here, a 64-year-old right-handed man is reported who developed a sudden typing disturbance without aphasia or neglect. Magnetic resonance imaging of the brain showed discrete acute infarcts in the border-zone regions, bilaterally, predominantly in the left hemisphere. The neuropsychiatric testing showed an impaired visual-spatial memory domain; however, other cognitive functions were all normal. These findings suggest that visual-spatial memory impairment, associated with a left frontal subcortical infarct, is a probable anatomic substrate associated with the inability to type.
Department of Neurology, The Catholic University of Korea, Seoul, Korea
The authors declare no conflicts of interest.
D.W.R. and J.S.K. conceived and coordinated the study, analyzed the data, and drafted the initial article. All authors were involved in the initial literature search and collection of data. Review of the initial article for major intellectual content was carried out by J.S.K. All authors read and approved the final article.
Reprints: Joong-Seok Kim, MD, PhD, Department of Neurology, The Catholic University of Korea, Seoul St. Mary’s Hospital, Banpo-dong, Seocho-gu, Seoul, 137-701, Korea (e-mail: firstname.lastname@example.org).
Received January 31, 2011
Accepted July 30, 2011