Abstract
We report a 57-year-old right-handed male in whom developmental stuttering had almost been cured previously who suffered a recurrence after callosal infarction. The patient's stuttering was much more severe than he had ever experienced. Investigation of his speech revealed the following results. 1 ) The main feature of his stuttering was repetition of sounds and syllables ; preparation (hesitation or preparatory movement of the articulatory organs before starting to speak) and breaks (inappropriate pauses within a word or a phrase) were also observed. 2 ) His stuttering was associated with secondary phenomena such as tongue clicking and facial grimacing. 3 ) His stuttering demonstrated no adaptation benefit and no benefits from repetition or choral reading ; it also exhibited
