Effects of repeated waist-pull perturbations on gait stability in subjects with cerebellar ataxia.
Federica Aprigliano, Dario Martelli, Jiyeon Kang and 5 others
PMID 30975168WHAT IT FOUND
After a single session of waist-pull perturbations, people with cerebellar ataxia walked with longer steps and better forward stability.
Their ability to recover from unexpected pushes did not improve, and they remained wider-stepped than healthy controls.
Key findings
01Participants with cerebellar ataxia showed improved forward dynamic stability and altered gait patterns during steady walking after the training session.
02The training did not improve the corrective balance recovery responses to unexpected perturbations in the cerebellar ataxia group.
03People with cerebellar ataxia consistently used a wider step and had higher lateral stability margins than healthy controls, both before and after training.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The study only measured effects immediately after a single training session, so it is unknown if these gait changes last or if repeated sessions would yield different results. The participants had mild ataxia and excluded those with significant sensory or cognitive impairments, limiting generalizability to more severely affected patients. The study measured biomechanical outcomes, not actual fall rates or clinical functional improvements. The small sample size (10 with ataxia) limits the statistical power and certainty of the findings.
Declared interests
The study was supported by non-U.S. government funding. No specific commercial conflicts of interest were declared in the text.
The easy way to misread this
Do not assume that perturbation training improves reactive balance recovery in cerebellar ataxia. The study found that while steady walking improved, the ability to recover from unexpected pushes did not change for the ataxia group.