A Systematic Investigation of Phonetic Complexity Effects on Articulatory Motor Performance in Progressive Dysarthria

Sponsor

University of Missouri-Columbia (Other)

Overall Status

Completed

CT.gov ID

NCT03613038

Collaborator

National Institute on Deafness and Other Communication Disorders (NIDCD) (NIH)

100

Enrollment

Locations

Arm

55.5

Actual Duration (Months)

Patients Per Site

0.9

Patients Per Site Per Month

Study Details

Study Description

Brief Summary

The goal is to improve the fundamental knowledge about articulatory motor performance in people with Lou Gehrig's disease (also known as ALS) and Parkinson's disease (PD), in order to develop more sensitive assessments for progressive speech loss, which may lead to the improved timing of speech therapies.

Condition or Disease	Intervention/Treatment	Phase
Amyotrophic Lateral Sclerosis Parkinson Disease	Behavioral: Phonetic complexity effects on speech motor performance	N/A

Detailed Description

The long-term goal is to optimize dysarthria assessment by improving the early detection and tracking of articulatory performance in progressive dysarthrias. The short-term goal of the proposed cross-sectional study is to focus on ALS and PD and quantify articulatory kinematic performance as a function of phonetic complexity, which is experimentally manipulated based on theoretical principles of speech motor development. The research strategy is to use 3D electromagnetic articulography to examine phonetic complexity effects of single word stimuli at the articulatory kinematic level in 15 talkers each with preclinical, mild, and moderate dysarthria, relative to 45 controls. The central hypothesis is that as dysarthria severity increases the discrepancy in articulatory performance, indexed by movement speed, distance, coordination, and variability, between people with dysarthria and typical controls will significantly increase at a lower phonetic complexity level.

Study Design

Study Type:

Interventional

Actual Enrollment :

100 participants

Allocation:

N/A

Intervention Model:

Single Group Assignment

Intervention Model Description:

Two groups of participants i.e., participants with ALS or PD and healthy controls will be asked to repeat sentences that have target words with varying phonetic complexity.Two groups of participants i.e., participants with ALS or PD and healthy controls will be asked to repeat sentences that have target words with varying phonetic complexity.

Masking:

None (Open Label)

Primary Purpose:

Basic Science

Official Title:

Understanding Communication and Cognitive Impairments in Neurodegenerative Disorders

Actual Study Start Date :

Jul 15, 2017

Actual Primary Completion Date :

Feb 28, 2022

Actual Study Completion Date :

Feb 28, 2022

Arms and Interventions

Arm	Intervention/Treatment
Other: Phonetic complexity effects Conduct a comprehensive kinematic assessment using state-of-the art 3D speech tracking technology on individuals with ALS and PD as well as healthy talkers to identify articulatory motor disturbances as a function of phonetic complexity and dysarthria severity. Phonetic complexity will be experimentally manipulated using the consonant and vowel complexity classification system proposed by Kent (1992) that takes into account the underlying articulatory motor adjustments required to produce various speech sounds.	Behavioral: Phonetic complexity effects on speech motor performance Use of 3D electromagnetic articulography to examine phonetic complexity effects of single word stimuli at the articulatory kinematic level in talkers each with preclinical, mild, and moderate dysarthria, relative to healthy controls.

Arm

Intervention/Treatment

Other: Phonetic complexity effects

Conduct a comprehensive kinematic assessment using state-of-the art 3D speech tracking technology on individuals with ALS and PD as well as healthy talkers to identify articulatory motor disturbances as a function of phonetic complexity and dysarthria severity. Phonetic complexity will be experimentally manipulated using the consonant and vowel complexity classification system proposed by Kent (1992) that takes into account the underlying articulatory motor adjustments required to produce various speech sounds.

Behavioral: Phonetic complexity effects on speech motor performance

Use of 3D electromagnetic articulography to examine phonetic complexity effects of single word stimuli at the articulatory kinematic level in talkers each with preclinical, mild, and moderate dysarthria, relative to healthy controls.

Outcome Measures

Primary Outcome Measures

Peak movement speed [Up to 3 months after enrollment]
Peak speed (millimeters/second) for each articulatory marker is the maximum value of the first-order derivative of each marker's Euclidean distance time-history.
Range of movement [Up to 3 months after enrollment]
The convex hull represents the smallest convex set containing all the points in the 3D motion path.
Duration [Up to 3 months after enrollment]
Word duration (seconds) is the time between onset and offset of movement for each word.
Spatiotemporal movement variability (STI) [Up to 3 months after enrollment]
STI is the most widely used metric to capture movement pattern variability during speech. To determine STI, the pattern of articulatory movements and the variability of that pattern over several repetitions of an utterance are examined.
Inter-articulator coordination [Up to 3 months after enrollment]
Spatiotemporal coupling relations between articulators will be derived from vertical movements of the articulators using a covariance measure.

Eligibility Criteria

Criteria

Ages Eligible for Study:

19 Years to 90 Years

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

Yes

Inclusion Criteria:

May or may not have a neurological impairment.
Age range of 19-90 years.
Male or female.
Provide written consent before any study specific procedures are performed.
Have ability to comply with basic instructions.
Monolingual English speaker.
Have ability to partake in a 90 minute data collection.

Exclusion Criteria:

Any speech, language, cognition, or hearing impairment prior to diagnosis of a neurodegenerative disease.
Anyone not appropriate for study participation, as deemed by the principal investigator.