Gait Responses in People with Parkinson Disease During Autonomous Closed-loop Rhythmic Auditory Stimulation: An Exploratory Analysis.
James T Cavanaugh, Franchino Porciuncula, Jenna A Zajac and 4 others
PMID 40438970WHAT IT FOUND
All 13 participants sped up when the system raised the music tempo mid-walk, taking faster, longer steps and keeping roughly to the beat.
Their walking rhythm did not get steadier during the walk, and six weeks of use changed little.
Key findings
01When the system raised the music tempo mid-walk, participants walked with a faster cadence, longer strides and quicker gait, at both the baseline and the post-intervention assessment.
02Those responses were largely unchanged after six weeks of use: the cadence and stride length increases were no bigger than at baseline, and only the gait speed increase after the programme was significant on its own.
03Nine of the 13 participants had lower average stride-to-stride variability after the six-week programme than before it (4.7% to 3.2%), while the other four were higher; the authors note this subgroup tended to have more variable gait to begin with.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
There was no control group in this analysis. Everyone received the system, so we cannot tell whether the changes came from the rhythmic cueing, from the walking exercise itself, or something else; the authors say the effect of exercise could not be ruled out. Participants were only measured while wearing the system. It is unclear whether anything carries over to walking without rhythmic cues, and the authors warn that any suggestion of cause and effect should be treated with caution. Only 13 people took part and they were relatively fit for a Parkinson's group. The parent trial excluded people with freezing of gait, cognitive impairment, higher fall risk and more severe disease, who are often described as the group that responds well to rhythmic auditory stimulation. The variability improvement was a post-hoc finding in an unbalanced subgroup (9 people versus 4), which the authors say made it impracticable to identify who responds better. Assessments took place in a supervised, uncluttered clinic hallway with minimal distractions, which reduces measurement error but may not reflect real-world walking. Six weeks may not have been long enough to show more robust changes in entrainment at faster tempos, in gait variability, or in natural walking cadence, stride length and speed.
Declared interests
One author (L.N.A.) was a paid advisor to MedRhythms, Inc., the company that makes the MR-005 system used in this study; the other authors declared no competing interests. The supplied article text does not state who funded the trial. The music used in the system was screened for therapeutic suitability by the system's manufacturer.
The easy way to misread this
Do not read the lower gait variability after six weeks as proof the programme works. That result came from a post-hoc subgroup of 9 of the 13 participants, and this analysis had no control group. The whole sample's cadence, stride length and variability responses to the tempo increase were no different after the programme than before it.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →