TY - JOUR
T1 - Dramatic effects of speech task on motor and linguistic planning in severely dysfluent parkinsonian speech
AU - Van Lancker Sidtis, Diana
AU - Cameron, Krista
AU - Sidtis, John J.
N1 - Funding Information:
Contributions to this project by Lisa Bonura and Zepur Dovlatyan are gratefully acknowledged. This work was supported by NIH R01 DC 007658, the Parkinson's Disease Foundation and the Bach-mann-Strauss Foundation.
PY - 2012/8
Y1 - 2012/8
N2 - In motor speech disorders, dysarthric features impacting intelligibility, articulation, fluency and voice emerge more saliently in conversation than in repetition, reading or singing. A role of the basal ganglia in these task discrepancies has been identified. Further, more recent studies of naturalistic speech in basal ganglia dysfunction have revealed that formulaic language is more impaired than novel language. This descriptive study extends these observations to a case of severely dysfluent dysarthria due to a parkinsonian syndrome. Dysfluencies were quantified and compared for conversation, two forms of repetition, reading, recited speech and singing. Other measures examined phonetic inventories, word forms and formulaic language. Phonetic, syllabic and lexical dysfluencies were more abundant in conversation than in other task conditions. Formulaic expressions in conversation were reduced compared to normal speakers. A proposed explanation supports the notion that the basal ganglia contribute to formulation of internal models for execution of speech.
AB - In motor speech disorders, dysarthric features impacting intelligibility, articulation, fluency and voice emerge more saliently in conversation than in repetition, reading or singing. A role of the basal ganglia in these task discrepancies has been identified. Further, more recent studies of naturalistic speech in basal ganglia dysfunction have revealed that formulaic language is more impaired than novel language. This descriptive study extends these observations to a case of severely dysfluent dysarthria due to a parkinsonian syndrome. Dysfluencies were quantified and compared for conversation, two forms of repetition, reading, recited speech and singing. Other measures examined phonetic inventories, word forms and formulaic language. Phonetic, syllabic and lexical dysfluencies were more abundant in conversation than in other task conditions. Formulaic expressions in conversation were reduced compared to normal speakers. A proposed explanation supports the notion that the basal ganglia contribute to formulation of internal models for execution of speech.
KW - Basal ganglia
KW - Dysfluency
KW - Motor speech planning
KW - Parkinson's disease
KW - Task effects
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U2 - 10.3109/02699206.2012.696307
DO - 10.3109/02699206.2012.696307
M3 - Article
C2 - 22774929
AN - SCOPUS:84863695833
VL - 26
SP - 695
EP - 711
JO - Clinical Linguistics and Phonetics
JF - Clinical Linguistics and Phonetics
SN - 0269-9206
IS - 8
ER -