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[Vol.37 No.3 contents]
Japanese/English
Full Text of this Articlein Japanese PDF (607K) |
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| ArticleTitle | A case with prosodic type of primary progressive apraxia of speech |
| Language | J |
| AuthorList | Nanayo Ogawa1)2), Shoko Ota1), Shinichi Terao3), Kyoko Suzuki1) |
| Affiliation |
1)Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University Graduate School of Medicine 2)Department of Rehabilitation, Kasugai Municipal Hospital 3)Department of Neurology, Mitaki General Hospital |
| Publication | Japanese Journal of Neuropsychology: 37 (3), 212-218, 2021 |
| Received | Sep 24, 2020 |
| Accepted | May 7, 2021 |
| Abstract |
Apraxia of speech (AOS) consists of phonetic and prosodic impairments. Primary progressive apraxia of speech (PPAOS) has two distinct subtypes: phonetic PPAOS characterized by distorted sound substitutions, and prosodic PPAOS characterized by slow, segmented speech. We report a case of pure prosodic PPAOS without distortions. A 68-year-old right-handed woman was admitted to our hospital with a 2-year history of progressive speech disturbance. However, her activities of daily living were well preserved. On admission, she showed AOS without impairment in word finding or comprehension. Neurological examinations revealed no motor or sensory disturbance or signs of parkinsonism. Her forward digit span was four and backward digit span was two. She scored 28/30 on the Mini-Mental State Examination. Aphasia and dysarthria were absent. Her memory and visuospatial functions were preserved. Buccofacial, limb- kinetic, and ideomotor apraxia were not observed. Magnetic resonance imaging showed cerebral atrophy mainly in the left parietal lobe. 99mTc-ECD SPECT demonstrated mild hypoperfusion in the left precentral gyrus and left supplementary motor area, and left-hemisphere-predominant parieto-occipital hypoperfusion. Her speech was analyzed using the AOS Rating Scale-3, which provides a quantitative description of the phonetic and prosodic features of AOS separately. The results revealed that her speech had only prosodic features of AOS without any phonetic features, indicating pure prosodic PPAOS. In addition, syllable segmentation was a prominent prosodic feature, and prolongation of each syllable was rarely observed. Most patients with PPAOS have both phonetic and prosodic features of AOS, and only one patient with pure prosodic PPAOS has been previously reported. Although a dominant prosodic feature of AOS in PPAOS was reported to be the prolongation of syllables our case demonstrated pure prosodic PPAOS with marked syllable segmentation. The features of AOS in PPAOS may vary according to the distribution of cerebral dysfunction in each case. |
| Keywords | primary progressive apraxia of speech (PPAOS), prosody, apraxia of speech rating scale-3 (ASRS-3), progressive nonfluent aphasia |
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