Conference proceeding
Spatiotemporal Coupling of the Jaw and Lower Lip: Comparing Talkers with Parkinson's Disease and Amyotrophic Lateral Sclerosis
Proceedings of the 13th International Seminar of Speech Production (ISSP 2024), pp.274-277
13th International Seminar of Speech Production (Autrans, France, 05/13/2024–05/17/2024)
2024
Abstract
This study sought to determine the differences in temporal coupling between the lower lip and jaw for two gestures i.e., the vowel /ʌ/ and the labiodental fricative /f/ in the word 'muffin.' Because articulatory timing can be disrupted by impairments to the basal ganglia and its role in intrinsic timing and the dynamic state of the articulatory system, interarticulator timing was compared between tallkers with amyotrphic lateral sclerosis (ALS) and Parkinson's disease (PD) relative to healthy controls. Electromagnetic articulography was used to record lower lip and jaw movements from six talkers with ALS, nine with PD, and 10 healthy controls. Lag values were obtained by subtracting the timepoint of the lower lip from the timepoint of the jaw for each gesture based on the timepoints of the positional minima for the jaw and lower lip during /ʌ/ and the positional maxima for the jaw and lower lip during /f/. Absolute lag times, percent lag (relative to total word duration), and coefficient of variation (CoV) values were compared between the three groups, as were effect sizes. Our results show a trend towards greater interarticulator timing differences (i.e., less temporal coupling) in talkers with ALS, whereas talkers with PD showed similar timing patterns to healthy controls. CoV values tended to be lower in the clinicial groups, with the ALS group showing more consistent lag times than even the PD group. Although preliminary, these results provide evidence of a mismatch between intrinsic timing and the physical state of the articulators in talkers with ALS. Despite basal ganglia pathology, the relative timing patterns among articulators appeared to be intact in talkers with PD.
Details
- Title: Subtitle
- Spatiotemporal Coupling of the Jaw and Lower Lip: Comparing Talkers with Parkinson's Disease and Amyotrophic Lateral Sclerosis
- Creators
- Mili Kuruvilla-Dugdale (Corresponding Author) - University of Iowa, Communication Sciences and DisordersAntje Mefferd - Vanderbilt University Medical Center
- Resource Type
- Conference proceeding
- Publication Details
- Proceedings of the 13th International Seminar of Speech Production (ISSP 2024), pp.274-277
- Conference
- 13th International Seminar of Speech Production (Autrans, France, 05/13/2024–05/17/2024)
- Publisher
- International Seminar of Speech Production
- Copyright
- Copyright © 2024 Mili Kuruvilla-Dugdale and Antje Mefferd
- Language
- English
- Date published
- 2024
- Academic Unit
- Neurology; Communication Sciences and Disorders
- Record Identifier
- 9984815417802771
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