Third International Conference on Spoken Language Processing (ICSLP 94)

Yokohama, Japan
September 18-22, 1994

Rhythm Processing by a Patient with Pure Anarthria: Some Suggestions on the Role of Rhythm in Spoken Language Processing

Morio Kohno (1), Junko Matsubara (2), Katsuko Higuchi (3), Toshihiro Kashiwagi (2)

(1) Kobe City University of Foreign Studies, Kobe, Japan
(2) Kyowakai Hospital, Osaka, Japan
(3) Wakakusa Second Tatsuma Hospital, Daito, Osaka, Japan

Rhythm processing consists of two neuropsychologically different works - holistic and analytic (Kohno, 1992). The former acts for the processing of fast rhythms and the latter for slow rhythms. A patient with pure anarthria (male, aged 45) (PA), nevertheless, dealt with all kinds of rhythm, including the fast one, by the analytic way alone. This extremely analytic idiosyncrasy may cause some of the typical symptoms of pure anarthria, such as motor incoordination of speech organs etc. In spite of this overly analytic way of processing, the patient clearly keeps the semantic unit which is generally perceived holistically, and shows the unit by pitch rising. This unit is called 'productive sense unit (PrSU) and it will be proven to be a counterpart of the 'perceptual sense unit* (PSU) whose existence was demonstrated by the authors' previous study on a split brain patient (Kohno, 1993). Judging from the fact that PA is a disease of speech production in motor programing, we may say that the PrSU, as well as the PSU, is rudimentarily made up in a deeper component than that of articulation programing. Finally, some evidence will be presented to show that speech disorders of PA may be brought about by the oppression of holistic processing, without destroying it, by the unusually analytic idiosyncrasy. These studies lead us to an important hypothesis that the holistic and analytic mechanisms may constitute a stratum - the holistic may make a basic structure and the analytic a hyperstructure.

Full Paper

Bibliographic reference.  Kohno, Morio / Matsubara, Junko / Higuchi, Katsuko / Kashiwagi, Toshihiro (1994): "Rhythm processing by a patient with pure anarthria: some suggestions on the role of rhythm in spoken language processing", In ICSLP-1994, 1223-1226.