Musical Distractions: Music-Based Rhythmic Auditory Stimulation Fails to Improve Gait in Huntington's Disease.

Area of Science:

• Neuroscience
• Movement Science
• Rehabilitation Medicine

Background:

• Huntington's disease (HD) is a neurodegenerative disorder impacting motor, cognitive, and psychiatric functions.
• Gait and balance impairments are significant challenges for individuals with HD.
• Current pharmacological treatments for HD motor symptoms have limited efficacy, necessitating exploration of non-pharmacological interventions.

Purpose of the Study:

• To investigate the effects of rhythmic auditory stimulation (RAS) using external musical cues and internal singing cues on walking performance in individuals with Huntington's disease.
• To describe changes in gait parameters such as cadence, velocity, stride length, and variability during RAS in HD.
• To explore the relationship between changes in gait and motor/cognitive measures in HD patients undergoing RAS.

Main Methods:

• Participants with manifest Huntington's disease walked under four conditions: comfortable pace, cognitive dual task, external musical cue, and internal singing cue.
• Gait parameters including cadence, velocity, stride length, and variability were measured using sensors.
• Correlations between changes in cadence and motor/cognitive performance were analyzed.

Main Results:

• Neither external musical cues nor singing cues significantly improved walking performance (speed, cadence, stride length) in individuals with HD.
• Both cueing conditions led to an increase in gait variability, comparable to the dual-task condition.
• Improved subjective balance confidence and better cognitive function were associated with positive changes in cadence during cueing, though few participants demonstrated increased cadence.

Conclusions:

• Rhythmic auditory stimulation with musical or singing cues did not enhance gait performance in Huntington's disease and may increase gait variability.
• The cognitive demands of these auditory cues might be too high for individuals with HD, potentially exacerbating gait instability.
• While cognitive function and balance confidence showed some association with cadence changes, the overall lack of benefit suggests these specific RAS interventions are not currently recommended for improving gait in HD.