Journal
JOURNAL OF SPEECH LANGUAGE AND HEARING RESEARCH
Volume 65, Issue 2, Pages 574-623Publisher
AMER SPEECH-LANGUAGE-HEARING ASSOC
DOI: 10.1044/2021_JSLHR-21-00396
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This study aimed to provide an overview of research on oral and laryngeal diadochokinesis (DDK) in children and adults. A total of 360 articles were included in the review. DDK plays an important role in clinical practice and research, and its clinical value can be optimized by considering task parameters, analysis methods, and population of interest.
Purpose: The aim of this study was to conduct a scoping review of research on oral and laryngeal diadochokinesis (DDK) in children and adults, either typically developing/developed or with a clinical diagnosis. Method: Searches were conducted with PubMed/MEDLINE, Google Scholar, CINAHL, and legacy sources in retrieved articles. Search terms included the motion rate, and syllable repetition rate. Results: Three hundred sixty articles were retrieved and included in the review. Data source tables for children and adults list the number and ages of study participants, DDK task, and language(s) spoken. Cross-sectional data for typically developing children and typically developed adults are compiled for the monosyllables /p(A)/, /t(A)/, and /k(A)/; the trisyllable /p(A)t(A)k(A)/; and laryngeal DDK. In addition, DDK results are summarized for 26 disorders or conditions. Discussion: A growing number of multidisciplinary reports on DDK affirm its role in clinical practice and research across the world. Atypical DDK is not a well-defined singular entity but rather a label for a collection of disturbances associated with diverse etiologies, including motoric, structural, sensory, and cognitive. The clinical value of DDK can be optimized by consideration of task parameters, analysis method, and population of interest.
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