TY - JOUR
T1 - Articulatory range of movement in individuals with dysarthria secondary to amyotrophic lateral sclerosis
AU - Lee, Jimin
AU - Bell, Michael
N1 - Funding Information:
The Social Science Research Institute/Children, Youth & Families Consortium Level I grant from the Pennsylvania State University (awarded to the first author) funded this research. We are grateful to the individuals with ALS who participated in this study. We thank the Penn State Hershey ALS Clinic and Research Center for supporting participant recruitment and Ana Daccach, Emily Dickey, and Elizabeth Rodriguez for assistance with data collection and analysis. Portions of the data were presented at the 2016 American Speech Language Hearing Association Convention.
Publisher Copyright:
© 2018 American Speech-Language-Hearing Association.
PY - 2018/8
Y1 - 2018/8
N2 - Purpose: The current study examined overall articulatory range of movement (ROM) in individuals with amyotrophic lateral sclerosis (ALS). Differential involvement of articulators was also tested using articulatory working space in individuals with varying degrees of dysarthria severity and in typically aging individuals. A strong association between overall articulatory ROM and severity measures among individuals with ALS was hypothesized. In addition, it was hypothesized that differential involvement of articulators would be detected using overall articulatory ROM measures. Method: Twenty-two speakers with dysarthria secondary to ALS and 22 typically aging speakers participated. Speech intelligibility and speaking rate were used as indices of severity. Movement range and overall articulatory working space area (convex hull) of the tongue, lower lip, and jaw were each measured by electromagnetic articulography while the speakers produced the Rainbow Passage. Results: Tongue convex hull size was significantly correlated with both indices of severity. A significant interaction between articulators and groups was observed. Individuals with severe dysarthria had reduced tongue convex hull size and exaggerated lower lip convex hull size. ROM in the anterior– posterior dimension showed a more notable differential involvement pattern than ROM in the superior–inferior dimension. Results in the area under a receiver operating characteristic curve analysis revealed group-specific ROM sensitivity. Conclusions: The findings indicate that tongue ROM is reduced in individuals with more severe dysarthria when estimated using a standardized paragraph containing all American English phonemes. The articulatory working space measure could be useful for estimating speech dysfunction in ALS. ROM of the tongue decreases, but ROM of the lower lip and jaw each increase in individuals with severe dysarthria. Differential involvement of the articulators in the anterior–posterior dimension needs to be further investigated.
AB - Purpose: The current study examined overall articulatory range of movement (ROM) in individuals with amyotrophic lateral sclerosis (ALS). Differential involvement of articulators was also tested using articulatory working space in individuals with varying degrees of dysarthria severity and in typically aging individuals. A strong association between overall articulatory ROM and severity measures among individuals with ALS was hypothesized. In addition, it was hypothesized that differential involvement of articulators would be detected using overall articulatory ROM measures. Method: Twenty-two speakers with dysarthria secondary to ALS and 22 typically aging speakers participated. Speech intelligibility and speaking rate were used as indices of severity. Movement range and overall articulatory working space area (convex hull) of the tongue, lower lip, and jaw were each measured by electromagnetic articulography while the speakers produced the Rainbow Passage. Results: Tongue convex hull size was significantly correlated with both indices of severity. A significant interaction between articulators and groups was observed. Individuals with severe dysarthria had reduced tongue convex hull size and exaggerated lower lip convex hull size. ROM in the anterior– posterior dimension showed a more notable differential involvement pattern than ROM in the superior–inferior dimension. Results in the area under a receiver operating characteristic curve analysis revealed group-specific ROM sensitivity. Conclusions: The findings indicate that tongue ROM is reduced in individuals with more severe dysarthria when estimated using a standardized paragraph containing all American English phonemes. The articulatory working space measure could be useful for estimating speech dysfunction in ALS. ROM of the tongue decreases, but ROM of the lower lip and jaw each increase in individuals with severe dysarthria. Differential involvement of the articulators in the anterior–posterior dimension needs to be further investigated.
UR - https://www.scopus.com/pages/publications/85051409514
UR - https://www.scopus.com/inward/citedby.url?scp=85051409514&partnerID=8YFLogxK
U2 - 10.1044/2018_AJSLP-17-0064
DO - 10.1044/2018_AJSLP-17-0064
M3 - Article
C2 - 29800071
AN - SCOPUS:85051409514
SN - 1058-0360
VL - 27
SP - 996
EP - 1009
JO - American journal of speech-language pathology
JF - American journal of speech-language pathology
IS - 3
ER -