Mirror writing in a patient with Alzheimer disease

Transient involuntary mirror writing triggered by anxiety

“…Allusions to MW in people with insanity or with dementia precox can be found in an encyclopaedia entry by Savage (1892), in Bianchi's treaty on psychiatry (1906), in Laprade's essay on MW (1905, p. 58) as well as in Critchley's seminal monograph (1928). The recent literature contains one brief case report of MW in Alzheimer's Disease (de Silva and Gunatilake, 2005), and a very short Research Letter reporting MW errors in 17 of 33 Chinese patients with Alzheimer's Disease, though without reporting the conditions of testing or the nature of the MW errors (Wang, Peng, Cai&Li, 2007). However, most MW errors are for single letters or digits, and reversal of complete words or phrases is extremely rare.…”