Abstract
Speech rate can be judged clinically using diadochokinetic (DDK) tasks, such as alternating motion rates (AMR) and sequential motion rates (SMR). We evaluated whether acoustic AMR/SMR speech rates would differentiate primary progressive apraxia of speech (PPAOS) from healthy controls, and determined how DDK rates relate to phonetic and prosodic speech characteristics and brain metabolism on FDG-PET. Rate was calculated for each of three AMRs (repetitions of ‘puh’, ‘tuh’, and ‘kuh’) and for SMRs (repetitions of ‘puhtuhkuh’) for 27 PPAOS patients and 52 controls who underwent FDG-PET. PPAOS patients were slower than controls on all DDK tasks. All DDK rates correlated with apraxia of speech severity, with strongest associations with prosodic speech features. Slower DDK rates were associated with hypometabolism in the right cerebellar dentate and left supplementary motor area. Performance on AMR rate, not just SMR rate, may be impaired in mild PPAOS, but sensitivity and specificity require further study.
Original language | English (US) |
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Article number | 105254 |
Journal | Brain and Language |
Volume | 240 |
DOIs | |
State | Published - May 2023 |
Keywords
- Acoustic analysis
- Aphasia
- Apraxia of speech
- PET
- Phonetic
- Prosodic
ASJC Scopus subject areas
- Experimental and Cognitive Psychology
- Language and Linguistics
- Linguistics and Language
- Cognitive Neuroscience
- Speech and Hearing