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- Title
Orofacial Muscle Strength across the Dysarthrias.
- Authors
Clark, Heather M.; Duffy, Joseph R.; Strand, Edythe A.; Hanley, Holly; Solomon, Nancy Pearl
- Abstract
This study compared orofacial muscle strength between normal and dysarthric speakers and across types of dysarthria, and examined correlations between strength and dysarthria severity. Participants included 79 speakers with flaccid, spastic, mixed spastic–flaccid, ataxic, or hypokinetic dysarthria and 33 healthy controls. Maximum pressure generation (Pmax) by the tongue, lips, and cheeks represented strength. Pmax was lower for speakers with mixed spastic–flaccid dysarthria for all tongue and lip measures, as well as for speakers with flaccid or spastic dysarthria for anterior tongue elevation and lip compression. Anterior tongue elevation and cheek compression tended to be lower than normal for the hypokinetic group. Pmax did not differ significantly between controls and speakers with ataxic dysarthria on any measure. Correlations were generally weak between dysarthria severity and orofacial weakness but were stronger in the dysarthria groups with more prominent orofacial weakness. The results generally support predictions that orofacial weakness accompanies flaccid and/or spastic dysarthria but not ataxic dysarthria. The findings support including type of dysarthria as a variable of interest when examining orofacial weakness in motor speech disorders.
- Subjects
MUSCLE strength; SPEECH disorders; LIPS; MOVEMENT disorders; DYSARTHRIA
- Publication
Brain Sciences (2076-3425), 2022, Vol 12, Issue 3, p365
- ISSN
2076-3425
- Publication type
Article
- DOI
10.3390/brainsci12030365