کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5045184 1475560 2017 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dissociating oral motor capabilities: Evidence from patients with movement disorders
ترجمه فارسی عنوان
اختلاط توانایی های حرکتی دهانی: شواهد از بیماران مبتلا به اختلالات حرکتی
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب رفتاری
چکیده انگلیسی


- Speech is governed by task-specific control mechanisms.
- Articulation rate cannot be reliably predicted by speech-like or nonspeech rate indices.
- Dysarthria assessments should include articulation rate measures based on real speech.

Abnormal articulation rate is a frequent symptom in neurogenic speech disorders. Performance rates in speech-like or nonspeech tasks involving the vocal motor apparatus are commonly accepted predictors of speech motor function in general and of articulation rate in particular. However, theoretical arguments and behavioral observations in populations with disordered speech indicate that different oral motor behaviors may be governed by distinct mechanisms. The objective of the present study was to expand our knowledge of the relationship between speech movements, on the one hand, and speech-like and nonspeech oral motor behaviors, on the other, by using a rate paradigm. 130 patients with neurological movement disorders of different origins and 130 neurologically healthy subjects participated in the study. Rate data was collected in a speech task (oral reading/repetition), in speech-like tasks (rapid syllable repetitions), and in nonspeech tasks (rapid single articulator movements of the tongue/lips). The main analyses involved a multiple single-case method, by which we tested for differences among each patient's performance rates on the three task types. The results disclosed statistically significant (classical and strong) dissociations between movement rates obtained from the speech task and those obtained from speech-like and nonspeech oral motor tasks in a number of patients. The findings can be interpreted as reflecting major differences in task demands and underlying control mechanisms. The validity of diagnostic indices for speech obtained from speech-like or nonspeech tasks must thus be called into question.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuropsychologia - Volume 95, 27 January 2017, Pages 40-53
نویسندگان
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