Writing disorder using a word processor: role of the left hand.

A young female secretary developed a writing disorder, exclusively expresse d when using a word processor, following an ischemic vascular event involvi ng the insula and the right posterior parietal region. There was no disturb ance of laterality. The neurological examination, completed by neuropsychol ogical tests eliminated any persistent phasic or gnostic disorders. The ana lysis of the text produced revealed abnormalities leading to the conclusion that the left hand was responsible for all the errors observed A sensorimo tor integration disorder produced a melokinetic apraxia which appeared to b e the cause of the writing disorder which would have most likely remained u nknown had the subject not been a secretary.