1. DIADOCOCINESIE Avec VOCALAB 4.1 Etienne.sicard@insa-toulouse.fr
12 Sept. 2019

2. Diadochokinetic
Diadochokinetic (DDK) task also known as syllable alternating motion rate (AMR)
Alternating motion rate (AMR) :
/pataka/pataka/..
/peteke/peteke/…
Typical duration: 5 to 10 seconds
Sequential motion rate (SMR)
/pa/pa/pa..
/ta/ta/ta….
The DDK task measures the subject’s ability to repeat a consonant–vowel (C-V) combination with bilabial, alveolar, and velar places of articulation
DDK metrics:
Syllable vocalizations rate (syllable/second): slow, normal, fast
Rate variations : regular/irregular, accelerating, slowing down

3. Syllable/second
PIERCE, J.E. (2013) Alternating and sequential motion rates in older adults, International Journal of Language & Communication Disorders · May 2013

4. Alternating Motion Rate (AMR)
Power(t)
FFT(power)
/pa/ta/ka/ répété
FFT de la puissance
L’abscisse du pic principal donne le débit
L’ordonnée du pic par rapport au bruit donne la régularité
Rythme usuel: 6 syllabes/seconde
Normal
Power(t)
FFT(power)
Pathologique

5. Alternating Motion Rate (AMR)
Parkinson : 6,6
Normal : 6,8
Débit
Débit
Portnoy, R. A., & Aronson, A. E. (1982). Diadochokinetic syllable rate and regularity in normal and in spastic and ataxic dysarthric subjects. Journal of Speech and Hearing Disorders, 47(3),
6,5
Débit
Débit
MSA: 4,7
PSP: 4,9

6. Irregular Alternating Motion Rate
Power(t)
Regular motion rate
Power(t)
Power(t)
Irregular motion rate

7. Irregular Motion Rate Regularity Regularity Normal : 3,6
Parkinson : 2,8
Regularity
PSP: 2,5
Regularity
MSA: 2,0

8. Syllable rate vs age
KENT
Physiological Phonetics p319
PIERCE 2013

9. Diadochokinetic
Defects in respiratory function caused by PD-related dysarthria may be the inability to maintain the intensity level.
Measurement of the intensity decline in performing the DDK task.
Rusz, J., (2011). Quantitative acoustic measurements for characterization of speech and voice disorders in early untreated Parkinson’s disease. The journal of the Acoustical Society of America, 129(1),

10. Merci pour votre attention