Effects and Mechanisms of RAS Training on Upper-limb Movements in PD Patients

Summary

Introduction Bradykinesia (i.e., slow movements) is one of the most prominent symptoms of Parkinson's disease (PD) and has a negative impact on quality of life. Rhythmic auditory stimulation (RAS), a widely used and promising treatment technique, has been shown to effectively improve gait speed in PD patients. However, only few studies have explored effects and neural mechanisms of RAS on upper-limb movements. We will conduct two studies to investigate effects and mechanisms of RAS on upper-limb movements in PD patients. The purpose of this study is to examine effects and neural mechanisms of upper-limb movement training involving RAS in PD patients.

Methods This study will recruit patients with PD and healthy controls. This study will randomly assign PD patients into two groups: the PD-RAS group and the PD-noRAS group, and healthy controls into the HC-RAS group and the HC-noRAS group. A 7-day upper-limb training involving RAS (for the PD-RAS group and the HC-RAS group) or without RAS (for the PD-noRAS group and the HC-noRAS group) will be provided. EEG and behavioral assessments will be conducted before and after the first day of training, and after the seven-day training program. Two-way repeated measures analysis of variance will be performed to investigate the group and time effects on upper-limb function and neural activity.

Study significance The training program will serve as a reference for clinical practitioners who are interested in using RAS in clinical training for PD patients.

Conditions

• Acoustic Stimulation
• Parkinson Disease
• Electroencephalography

Interventions

BEHAVIORAL

Upper-limb training involving RAS

Three target bowls, labeled as the left, middle, and right target bowl, will be placed on the table at an equal distance from the main bowl. The distance between a target bowl and the main bowl is set at 30 cm. Wooden beads with a diameter of 2 cm will be put in target bowls. The main bowl will be placed in front of the patient. Patients will be asked to listen to the RAS sound, use the right hand to take one bead at a time from the left target bowl to the main bowl, repeat this movement for the middle and right target bowls, and keep repeating this order. They should keep their movements consistent with the sound of the RAS, with one RAS sound corresponding to one pick-up movement. Each daily training will consist of three rounds separated by two 5-minute breaks. Each round will consist of four consecutive sessions (for each session: 2-minute training followed by a 30-second break). The training will last for a total of 7 days.

BEHAVIORAL

Upper-limb training without the aid of RAS

Three target bowls, labeled as the left, middle, and right target bowl, will be placed on the table at an equal distance from the main bowl. The distance between a target bowl and the main bowl is set at 30 cm. Wooden beads with a diameter of 2 cm will be put in target bowls. The main bowl will be placed in front of the patient. Patients will be asked to use the right hand to take one bead at a time from the left target bowl to the main bowl, repeat this movement for the middle and right target bowls, and keep repeating this order. They are asked to execute the task as fast as possible. Each daily training will consist of three rounds separated by two 5-minute breaks. Each round will consist of four consecutive sessions (for each session: 2-minute training followed by a 30-second break). The training will last for a total of 7 days.

Sponsors & Collaborators

• The Hong Kong Polytechnic University

  lead OTHER

Principal Investigators

• Wei FAN (PhD student), MSc · The Hong Kong Polytechnic University

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Model

PARALLEL

Eligibility

Min Age

18 Years

Max Age

85 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2025-05-01

Primary Completion

2026-03-31

Completion

2026-03-31