Association Between Temporal Asymmetry and Muscle Synergy During Walking With Rhythmic Auditory Cueing in Survivors of Stroke Living With Impairments.
Naomichi Mizuta, Naruhito Hasui, Yuki Nishi and 7 others
PMID 35756980WHAT IT FOUND
Listening to a metronome while walking immediately increased stance time on the weaker leg and improved step symmetry in stroke survivors.
The change in stance time was the main factor linked to more complex muscle coordination, not changes in joint angles.
Key findings
01Rhythmic auditory cueing significantly increased single-leg support time on the paretic side and improved symmetry compared to comfortable walking.
02The change in single-leg support time was significantly associated with changes in muscle synergy complexity, whereas changes in joint angles were not.
03Walking speed and cadence did not change significantly with rhythmic auditory cueing.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTs
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What it does not show
The study was cross-sectional with measurements taken at only one time point, so it cannot determine long-term effects or causality. Some participants used a cane, which may have influenced walking parameters. EMG amplitude was not normalized to maximum voluntary contraction, which may affect comparisons of muscle activation magnitude. The study included only survivors of stroke who could walk independently and had no cognitive impairment (MMSE ≥ 24), so results may not apply to those with more severe deficits or cognitive impairment.
Declared interests
The authors declared no conflicts of interest. The study was approved by the Institutional Ethics Committee of the Takarazuka Rehabilitation Hospital.
The easy way to misread this
Do not assume these benefits persist after the metronome is removed. The study measured immediate effects during cueing only, not long-term motor learning or carryover to unassisted walking.