Responders to Rhythmic Auditory Cueing in Parkinson Disease

NCT ID: NCT05733819

Last Updated: 2024-03-18

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE1
• Total Enrollment: 31 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2023-01-17
• Study Completion Date: 2023-06-30

Brief Summary

Parkinson disease (PD) is the second most common neurodegenerative disease affecting approximately 10 million people worldwide. It is a complex movement disorder that results in reduced walking ability. Prior studies have identified declines in walking as a marker of ensuing disability. Rhythmic auditory stimulation (RAS) is a rehabilitation approach that employs the coupling of auditory cues with movement. Walking with RAS has been shown to benefit walking rhythmicity, quality, and speed. These walking benefits make RAS advantageous in promoting regular moderate-intensity walking activity -- an important health objective in the management of PD. However, there is limited research investigating the effects of RAS on walking quality and how improvements in walking speed are achieved. This study will enroll 30 individuals with mild to moderate PD where each participant will be asked to complete two six-minute walk tests, one standard test (baseline) and the other using an optimized metronome-based auditory cueing RAS intervention. The investigators hypothesize that individuals with PD will either walk farther or with more automaticity (i.e., reduced stride time variability) in the RAS condition compared to the baseline condition. Moreover, these walking improvements will be accompanied by improvements in gait mechanics and metabolic cost of walking.

Detailed Description

Parkinson Disease (PD) is one of the fastest-growing sources of disability among neurological populations. PD is a progressive movement disorder characterized by substantial walking-related disability. Loss of function and quality of walking can subsequently lead to declines in walking which can precipitate a cycle of disability and deconditioning. In particular, persons with PD often demonstrate a reduction in stride length and an increase in stride time variability. These gait changes can reduce mobility and increase the risk of falls. Improving walking has been identified as the greatest priority among persons with PD for improving independence and quality of life. Therefore, interventions targeting improvements in walking function and gait quality are needed to mitigate a walking-related disability.

Rhythmic Auditory Stimulation (RAS) is a rehabilitation intervention that, unlike pharmacologic treatment, has shown promise for improving walking in PD. Walking with RAS intervention has been shown to improve walking function, particularly walking speed. RAS relies on the robust human capacity to synchronize movements to an external rhythm (i.e., walking to a regular auditory beat), a process referred to as auditory-motor entrainment. Due to the body's preference to select a walking frequency that maximizes stability and minimizes energy expenditure, rhythmic entrainment may stabilize gait patterns and reduce the metabolic cost of walking. Moreover, rhythmic entrainment is thought to reduce the attentional demand of walking in persons with PD, allowing for attention to be allocated to secondary tasks essential for safe community navigation. Despite evidence of the effectiveness of improving walking speed and gait function, the biomechanical changes that enable this improvement are not well understood.

Moreover, while RAS is an effective treatment, not everyone benefits from the treatment equally. Individuals with PD have a wide variety of gait presentations, and gait impairment may affect the efficacy of RAS treatment. In this study, the investigators want to understand who responds to RAS interventions and if the investigators can identify these responders from baseline measurements. For this analysis, the investigators define responders in three ways: (1) individuals who increase walking function, (2) individuals who increase gait quality, or (3) individuals who increase both gait quality and walking function while walking to personalized RAS. The investigators hypothesize that individuals who increase walking function and/or gait quality while walking to personalized RAS are more likely to be responsive to long-term intervention with RAS; however, the mechanism of action that enables the long-term response is hypothesized to be different based on baseline deficits. The investigators posit that the short-term responses to RAS measured in this study may suggest potential long-term mechanisms.

Study Protocol:

To examine the different effects of the intervention, each participant will complete a data collection session with a series of clinical tests including the Mini-BEST, UPDRS, the 10-m walk test (10MWT) at comfortable and fast walking speed, and the 6-minute walk test (6MWT) to quantity baseline function. Moreover, the 6MWT will be fully instrumented using motion capture cameras that track retro-reflective markers, wireless inertial measurement units, and force plates embedded in the walkway---together, these systems will enable concurrent collection of gait kinematic, inertial, and kinetic signals respectively. Additionally, metabolic measures will be collected during the 6MWT. After the baseline 6-minute walk test, participants will wear a custom, simple RAS device that will use a metronome application and bone-conducting headphones to provide auditory cues designed to modulate the participant's walking cadence. The auditory cues provided will be subject-specific based on a tuning procedure. Finally, the 6MWT will be repeated with RAS set to the optimally selected cadence based on the tuning procedure.

The primary objective of this study is to determine the effect of personalized RAS on walking function (i.e., 6MWT total distance) and gait quality (i.e., stride time variability). The investigators will also evaluate RAS-induced changes in other, secondary gait quality metrics: (1) the metabolic cost of transport, (2) walking ground reaction forces, (3) joint kinetics, and (4) distance-induced changes in spatial-temporal gait parameters. A secondary objective is to determine if RAS-induced changes in walking function and/or gait quality are related to specific patterns of baseline walking and gait impairment (i.e., movement phenotypes).

Conditions

Parkinson Disease

Study Design

• Allocation Method: NON_RANDOMIZED
• Intervention Model: CROSSOVER
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Walking without personalized rhythmic auditory stimulation

Subjects will complete a 6MWT without any auditory cues

Group Type: ACTIVE_COMPARATOR

Active Walking

Intervention Type: BEHAVIORAL

Walking without RAS cueing

Walking with personalized rhythmic auditory stimulation

Subjects will complete a 6MWT with personalized rhythmic auditory cues

Group Type: EXPERIMENTAL

Subject-specific optimized RAS

Intervention Type: DEVICE

Walking with metronome-based RAS cueing

Active Walking

Intervention Type: BEHAVIORAL

Walking without RAS cueing

Interventions

Subject-specific optimized RAS

Walking with metronome-based RAS cueing

Intervention Type: DEVICE

Active Walking

Walking without RAS cueing

Intervention Type: BEHAVIORAL

Other Intervention Names

RAS

Eligibility Criteria

Inclusion Criteria

• Be able to communicate with investigators clearly
• Diagnosis of Parkinson's disease (self-report)
• The ability to walk continuously without another individual supporting the person's body weight for at least 6 minutes. Assistive devices, such as a cane, are allowed.

Exclusion Criteria

• Inability to communicate (as assessed by a licensed physical therapist)
• Parkinson's disease, score < 23 on the MMSE.
• Pain that impairs walking ability (as assessed by a licensed physical therapist)
• Unexplained dizziness in the last 6 months (self-report)
• Severe comorbidities that may interfere with the ability to participate (musculoskeletal, cardiovascular, pulmonary, and neurological)
• More than 2 falls in the previous month

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 80 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Terry Ellis, PT, PhD

UNKNOWN

Sponsor Role: collaborator

Boston University Charles River Campus

OTHER

Sponsor Role: lead

Responsible Party

Lou Awad, PT, DPT, PhD

Assistant Professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

Boston University Neuromotor Recovery Laboratory

Boston, Massachusetts, United States

Countries

United States

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Other Identifiers

4440-PD

Identifier Type: -

Identifier Source: org_study_id