Abstract
We reported a case of mumbling jargon. The subject was a 63-year-old right-handed woman. The study investigated the mechanism underlying the subject's mumbling jargon mainly from three viewpoints : auditory comprehension intimately related to monitoring of speech activity, personality effects on communication activity, and intentional phonetic motor control.
We concluded that it is difficult to explain this case of jargon by the present monitoring deficit theory based on auditory feedback, because auditory comprehension is well preserved. The jargon of this patient is thought to be associated with personality ; she tends to focus tenaciously on things, and demonstrates impatience and restlessness. From the viewpoint of speech function, the jargon is associated with intentional phonetic motor control deficit. In addition to the foregoing two factors, it is speculated to be associated with plural factors of inner language disorder at various levels : syntax, meaning, phonemes and so on.
